{"title":"Imaging Filters","description":"\u003cp\u003eImaging filters are used to increase details in specific Oxygen III, H-Alpha, Sulfur II, H-Beta and more line in the spectrum graphic. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","products":[{"product_id":"chroma-lrgb-filter-set","title":"Chroma LRGB Filter Set","description":"\u003ch1\u003eChroma LRGB Filter Set\u003c\/h1\u003e\n\u003cp\u003eChroma LRGB Filter Set includes four individual filters: luminance, red, green and blue. They are available in multiple sizes.\u003c\/p\u003e\n\u003cp\u003eHighly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. We provide custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. We also can provide larger sizes and unique passbands upon request.\u003c\/p\u003e\n\u003cp\u003eChroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items.\u003c\/p\u003e\n\u003cp\u003eWe manufacture the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eLRGB filter set of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25\" round mounted","offer_id":43652186898661,"sku":"CHR-27101-1.25","price":735.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted","offer_id":43652186931429,"sku":"CHR-27101-2","price":2695.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43652186964197,"sku":"CHR-27101-31","price":735.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43652186996965,"sku":"CHR-27101-36","price":1155.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43652187029733,"sku":"CHR-27101-50","price":2415.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43652187062501,"sku":"CHR-27101-50S","price":2555.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-lrgb-filter-set-astronomy-plus_587a97d7-1919-4303-b9b4-2781ded53808.png?v=1690483352"},{"product_id":"chroma-3nm-h-alpha-filter","title":"Chroma 3nm H-Alpha Filter","description":"\u003ch2\u003eChroma 3nm H-alpha Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma 3nm H-alpha Filter is essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrowband emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch4\u003eAvailable Sizes\u003c\/h4\u003e\n\u003cp\u003e1.25″ round mounted (27001-1.25″) 2″ round mounted (27001-2″) 31mm round unmounted (27001-31) 36mm round unmounted (27001-36) 50mm round unmounted (27001-50) 50mm x 50mm square unmounted (27001-50S)\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFilter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted (27001-1.25″)","offer_id":43647592693989,"sku":"CHR-27001-1.25","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted (27001-2″)","offer_id":43647592726757,"sku":"CHR-27001-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted (27001-31)","offer_id":43647592759525,"sku":"CHR-27001-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted (27001-36)","offer_id":43647592792293,"sku":"CHR-27001-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted (27001-50)","offer_id":43647592825061,"sku":"CHR-27001-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted (27001-50S)","offer_id":43647592890597,"sku":"CHR-27001-50S","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-h-alpha-filter-astronomy-plus-1.webp?v=1690483351"},{"product_id":"chroma-5nm-h-alpha-filter","title":"Chroma 5nm H-alpha Filter","description":"\u003ch2\u003eChroma 5nm H-alpha Filter\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm).\u003c\/li\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Chroma 5nm H-alpha Filter is essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrowband emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 5nm H-Alpha Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647835865317,"sku":"CHR-27002-1.25\"","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647835898085,"sku":"CHR-27002-2\"","price":1365.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647835930853,"sku":"CHR-27002-31","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647835963621,"sku":"CHR-27002-36","price":868.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647835996389,"sku":"CHR-27002-50","price":1295.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647836029157,"sku":"CHR-27002-50S","price":1932.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-5nm-h-alpha-filter-astronomy-plus-1.webp?v=1690483351"},{"product_id":"chroma-8nm-h-alpha-filter","title":"Chroma 8nm H-alpha Filter","description":"\u003ch2\u003eChroma 8nm H-alpha Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma 8nm H-alpha Filter is essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrowband emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003cbr\u003eParallelism: \u0026lt;30 arcsec\u003cbr\u003eThickness: 3.0 +\/-0.05mm\u003cbr\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003cbr\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 8nm H-Alpha Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647953567973,"sku":"CHR-27003-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647953600741,"sku":"CHR-27003-2","price":1162.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647953633509,"sku":"CHR-27003-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647953666277,"sku":"CHR-27003-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647953699045,"sku":"CHR-27003-50","price":1092.0,"currency_code":"CAD","in_stock":true},{"title":"50x50 square unmounted","offer_id":43647953731813,"sku":"CHR-27003-50S","price":1106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-8nm-h-alpha-filter-astronomy-plus-1.webp?v=1690483351"},{"product_id":"chroma-3nm-h-beta-filter","title":"Chroma 3nm H-Beta Filter","description":"\u003ch2\u003eChroma 3nm H-Beta Filter\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-beta filters are also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrow-band filter is required to separate H-beta from nearby blue and green spectral lines. Although weaker than the H-alpha line, this is often used for visual detection as the longer red wavelengths of H-alpha are difficult to detect by eye\u003c\/li\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\nThe Chroma 3nm H-beta Filter is also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrowband filter is required to separate H-beta from nearby blue and green spectral lines. Although weaker than the H-alpha line, this is often used for visual detection as the longer red wavelengths of H-alpha are difficult to detect by eye. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 3nm H-beta Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647747129573,"sku":"CHR-27004-1.25","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647747162341,"sku":"CHR-27004-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647747195109,"sku":"CHR-27004-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647747227877,"sku":"CHR-27004-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647747260645,"sku":"CHR-27004-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm Square unmounted","offer_id":43647747293413,"sku":"CHR-27004-50S","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-h-beta-filter-astronomy-plus-1.webp?v=1690483351"},{"product_id":"chroma-5nm-h-beta-filter","title":"Chroma 5nm H-Beta Filter","description":"\u003ch2\u003eChroma 5nm H-beta Filter\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-beta filters are also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrow-band filter is required to separate H-beta from nearby blue and green spectral lines. Although weaker than the H-alpha line, this is often used for visual detection as the longer red wavelengths of H-alpha are difficult to detect by eye\u003c\/li\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Chroma 5nm H-beta Filter is also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrowband filter is required to separate H-beta from nearby blue and green spectral lines. Although weaker than the H-alpha line, this is often used for visual detection as the longer red wavelengths of H-alpha are difficult to detect by eye. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 5nm H-beta Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647863095525,"sku":"CHR-27005-1.25","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647863128293,"sku":"CHR-27005-2","price":1365.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647863161061,"sku":"CHR-27005-31","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647863193829,"sku":"CHR-27005-36","price":868.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647863226597,"sku":"CHR-27005-50","price":1295.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647863259365,"sku":"CHR-27005-50S","price":1932.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-5nm-h-beta-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-3nm-sii-filter","title":"Chroma 3nm SII Filter","description":"\u003ch2\u003eChroma 3nm SII Filter\u003c\/h2\u003e\nThe Chroma 3nm SII Filter isolates the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 3nm SII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647809159397,"sku":"CHR-27009-1.25","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647809192165,"sku":"CHR-27009-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647809224933,"sku":"CHR-27009-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647809257701,"sku":"CHR-27009-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647809290469,"sku":"CHR-27009-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647809323237,"sku":"CHR-27009-50S","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-sii-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-5nm-sii-filter","title":"Chroma 5nm SII Filter","description":"\u003ch2\u003eChroma 5nm SII Filter\u003c\/h2\u003e\nThe Chroma 5nm SII Filter isolates the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eChroma 5nm SII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647924306149,"sku":"CHR-27010-1.25","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647924338917,"sku":"CHR-27010-2","price":1365.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647924371685,"sku":"CHR-27010-31","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647924404453,"sku":"CHR-27010-36","price":868.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647924437221,"sku":"CHR-27010-50","price":1295.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647924469989,"sku":"CHR-27010-50S","price":1932.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-5nm-sii-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-8nm-sii-filter","title":"Chroma 8nm SII Filter","description":"\u003ch2\u003eChroma 8nm SII Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma 8nm SII Filter isolates the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003cbr\u003eParallelism: \u0026lt;30 arcsec\u003cbr\u003eThickness: 3.0 +\/-0.05mm\u003cbr\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003cbr\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 8nm SII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43648000327909,"sku":"CHR-27011-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43648000360677,"sku":"CHR-27011-2","price":1162.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43648000393445,"sku":"CHR-27011-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43648000426213,"sku":"CHR-27011-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43648000458981,"sku":"CHR-27011-50","price":1092.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43648000491749,"sku":"CHR-27011-50S","price":1106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-8nm-sii-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-3nm-oiii-filter","title":"Chroma 3nm OIII Filter","description":"\u003ch2\u003eChroma 3nm OIII Filter\u003c\/h2\u003e\nThe Chroma 3nm OIII Filter isolates the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when imaging nebulae. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 3nm OIII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647786189029,"sku":"CHR-27006-1.25","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647786221797,"sku":"CHR-27006-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647786254565,"sku":"CHR-27006-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647786287333,"sku":"CHR-27006-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647786320101,"sku":"CHR-27006-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647786352869,"sku":"CHR-27006-50S","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-oiii-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-5nm-oiii-filter","title":"Chroma 5nm OIII Filter","description":"\u003ch2\u003eChroma 5nm OIII Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma 5nm OIII Filter isolates the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when imaging nebulae. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 5nm OIII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647896256741,"sku":"CHR-27007-1.25","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647896289509,"sku":"CHR-27007-2","price":1365.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647896322277,"sku":"CHR-27007-31","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647896355045,"sku":"CHR-27007-36","price":868.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647896387813,"sku":"CHR-27007-50","price":1295.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647896453349,"sku":"CHR-27007-50S","price":1932.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-5nm-oiii-filter-astronomy-plus-1.webp?v=1690483363"},{"product_id":"chroma-8nm-oiii-filter","title":"Chroma 8nm OIII Filter","description":"\u003ch2\u003eChroma 8nm OIII Filter\u003c\/h2\u003e\nThe Chroma 8nm OIII Filter isolates the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when imaging nebulae. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eTechnical Specifications\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003cbr\u003eParallelism: \u0026lt;30 arcsec\u003cbr\u003eThickness: 3.0 +\/-0.05mm\u003cbr\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003cbr\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 8nm OIII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647980536037,"sku":"CHR-27008-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647980568805,"sku":"CHR-27008-2","price":1162.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647980601573,"sku":"CHR-27008-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647980667109,"sku":"CHR-27008-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647980699877,"sku":"CHR-27008-50","price":1092.0,"currency_code":"CAD","in_stock":true},{"title":"50x50 square unmounted","offer_id":43647980732645,"sku":"CHR-27008-50S","price":1106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-8nm-oiii-filter-astronomy-plus-1.webp?v=1690483363"},{"product_id":"chroma-halrgb-filter-set","title":"Chroma HaLRGB Filter Set","description":"\u003ch2\u003eChroma HaLRGB Filter Set\u003c\/h2\u003e\n\u003cp\u003eThe Chroma HaLRGB Filter Set includes five individual filters: 8nm H-alpha, luminance, red, green and blue. They are available in multiple sizes. H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm). Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. We provide custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. We also can provide larger sizes and unique passbands upon request. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. We manufacture the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eH-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm).\u003c\/li\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 8 nm Ha + LRGB Filter Set of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25\" round mounted","offer_id":43651934912741,"sku":"CHR-27102-1.25","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted","offer_id":43651934945509,"sku":"CHR-27102-2","price":3822.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43651934978277,"sku":"CHR-27102-31","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43651935011045,"sku":"CHR-27102-36","price":1617.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43651935043813,"sku":"CHR-27102-50","price":3472.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted","offer_id":43651935076581,"sku":"CHR-27102-50S","price":3626.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-halrgb-filter-set-astronomy-plus_802e891b-aa35-4e54-95a9-a21c15f5a962.png?v=1690483363"},{"product_id":"chroma-bessel-ubvri-filter-set","title":"Chroma Bessel UBVRI Filter Set","description":"\u003ch2\u003eChroma Bessel UBVRI Filter Set\u003c\/h2\u003e\n\u003cp\u003eU-Bessel: UV photometric filter in UVBRI series\u003cbr\u003eV-Bessel: Green (Visible) photometric filter in UVBRI series\u003cbr\u003eB-Bessel: Blue photometric filter in UVBRI series\u003cbr\u003eR-Bessel: Red photometric filter in UVBRI series\u003cbr\u003eI-Bessel: NIR photometric filter in UVBRI series\u003c\/p\u003e\n\u003cp\u003eChroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items.\u003c\/p\u003e\n\u003cp\u003eHighly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request.\u003c\/p\u003e\n\u003cp\u003eChroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUBVRI filter set for photometric imaging\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate \u003c\/span\u003e\u003cspan\u003ein CWL and band pass adherence\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Chroma Bessel UBVRI Filter Set is made for photometric imaging in five different bandpass.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable, anti-reflective coatings onboth exterior surfaces over applicable transmission range\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 4.9 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParfocal +\/-0.2mm\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma Bessel UBVRI Filter Set of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43651392864485,"sku":"CHR-27103-1.25","price":1645.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43651392897253,"sku":"CHR-27103-2","price":4620.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43651392930021,"sku":"CHR-27103-50","price":4270.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43651392962789,"sku":"CHR-27103-50S","price":4795.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-bessel-ubvri-filter-set-astronomy-plus_6183b9d4-7d3d-46cb-bf11-12af67550a36.png?v=1690483372"},{"product_id":"chroma-lrgb-individual-filters","title":"Chroma LRGB Individual Filters","description":"\u003ch2\u003eChroma LRGB Individual Filters\u003c\/h2\u003e\n\u003cp\u003eYou have the option to buy Chroma LRGB filters individually. The Lum, Red, Green \u0026amp; Blue filters are also available in multiple sizes.\u003c\/p\u003e\n\u003cp\u003eHighly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. We provide custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. We also can provide larger sizes and unique passbands upon request.\u003c\/p\u003e\n\u003cp\u003eChroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items.\u003c\/p\u003e\n\u003cp\u003eWe manufacture the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eFilter of the chosen size and color\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25\" round mounted \/ Luminance (27040)","offer_id":43652254138597,"sku":"CHR-27040-1.25","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ Red (27041)","offer_id":43652254204133,"sku":"CHR-27041-1.25","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ Green (27042)","offer_id":43652254269669,"sku":"CHR-27042-1.25","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ Blue (27043)","offer_id":43652254335205,"sku":"CHR-27043-1.25","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ Luminance (27040)","offer_id":43652254367973,"sku":"CHR-27040-2","price":700.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ Red (27041)","offer_id":43652254466277,"sku":"CHR-27041-2","price":700.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ Green (27042)","offer_id":43652254499045,"sku":"CHR-27042-2","price":700.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ Blue (27043)","offer_id":43652254564581,"sku":"CHR-27043-2","price":700.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ Luminance (27040)","offer_id":43652254630117,"sku":"CHR-27040-31","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ Red (27041)","offer_id":43652254662885,"sku":"CHR-27041-31","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ Green (27042)","offer_id":43652254695653,"sku":"CHR-27042-31","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ Blue (27043)","offer_id":43652254728421,"sku":"CHR-27043-31","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ Luminance (27040)","offer_id":43652254761189,"sku":"CHR-27040-36","price":315.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ Red (27041)","offer_id":43652254793957,"sku":"CHR-27041-36","price":315.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ Green (27042)","offer_id":43652254826725,"sku":"CHR-27042-36","price":315.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ Blue (27043)","offer_id":43652254859493,"sku":"CHR-27043-36","price":315.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted \/ Luminance (27040)","offer_id":43652254892261,"sku":"CHR-27040-50","price":630.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted \/ Red (27041)","offer_id":43652254925029,"sku":"CHR-27041-50","price":630.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted \/ Green (27042)","offer_id":43652254957797,"sku":"CHR-27042-50","price":630.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted \/ Blue (27043)","offer_id":43652254990565,"sku":"CHR-27043-50","price":630.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted \/ Luminance (27040)","offer_id":43652255023333,"sku":"CHR-27040-50S","price":665.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted \/ Red (27041)","offer_id":43652255056101,"sku":"CHR-27041-50S","price":665.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted \/ Green (27042)","offer_id":43652255088869,"sku":"CHR-27042-50S","price":665.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted \/ Blue (27043)","offer_id":43652255121637,"sku":"CHR-27043-50S","price":665.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-lrgb-individual-filters-astronomy-plus-1_5632751b-5e09-4f32-8342-efb57681df82.png?v=1690483380"},{"product_id":"chroma-bessel-ubvri-individual-filters","title":"Chroma Bessel UBVRI Individual Filters","description":"\u003ch2\u003eChroma Bessel UBVRI Individual Filters\u003c\/h2\u003e\n\u003cp\u003eThe Chroma Bessel UBVRI Filters are made for photometric imaging in five different bandpass. They are available for purchase individually.\u003c\/p\u003e\n\u003cp\u003eU-Bessel: UV photometric filter in UBVRI series\u003cbr\u003eB-Bessel: Blue photometric filter in UBVRI series\u003cbr\u003eV-Bessel: Green (Visible) photometric filter in UBVRI series\u003cbr\u003eR-Bessel: Red photometric filter in UBVRI series\u003cbr\u003eI-Bessel: NIR photometric filter in UBVRI series\u003c\/p\u003e\n\u003cp\u003eChroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items.\u003c\/p\u003e\n\u003cp\u003eHighly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request.\u003c\/p\u003e\n\u003cp\u003eChroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUBVRI filter set for photometric imaging\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate \u003c\/span\u003e\u003cspan\u003ein CWL and band pass adherence\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Chroma Bessel UBVRI Filter Set is made for photometric imaging in five different bandpass.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable, anti-reflective coatings onboth exterior surfaces over applicable transmission range\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 4.9 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParfocal +\/-0.2mm\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma Bessel UBVRI Filter Set of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25\" round mounted \/ U-Bessel (27050)","offer_id":43651453747429,"sku":"CHR-27050-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ B-Bessel (27052)","offer_id":43651453780197,"sku":"CHR-27052-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ V-Bessel (27051)","offer_id":43651453812965,"sku":"CHR-27051-125","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ R-Besse(27053)","offer_id":43651453845733,"sku":"CHR-27053-125","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ I-Bessel(27054)","offer_id":43651453878501,"sku":"CHR-27054-125","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ U-Bessel (27050)","offer_id":43651453911269,"sku":"CHR-27050-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ B-Bessel (27052)","offer_id":43651453944037,"sku":"CHR-27052-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ V-Bessel (27051)","offer_id":43651453976805,"sku":"CHR-27051-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ R-Besse(27053)","offer_id":43651454009573,"sku":"CHR-27053-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ I-Bessel(27054)","offer_id":43651454042341,"sku":"CHR-27054-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ U-Bessel (27050)","offer_id":43651454075109,"sku":"CHR-27050-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ B-Bessel (27052)","offer_id":43651454107877,"sku":"CHR-27052-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ V-Bessel (27051)","offer_id":43651454140645,"sku":"CHR-27051-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ R-Besse(27053)","offer_id":43651454173413,"sku":"CHR-27053-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ I-Bessel(27054)","offer_id":43651454206181,"sku":"CHR-27054-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ U-Bessel (27050)","offer_id":43651454238949,"sku":"CHR-27050-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ B-Bessel (27052)","offer_id":43651454271717,"sku":"CHR-27052-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ V-Bessel (27051)","offer_id":43651454304485,"sku":"CHR-27051-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ R-Besse(27053)","offer_id":43651454337253,"sku":"CHR-27053-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ I-Bessel(27054)","offer_id":43651454370021,"sku":"CHR-27054-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ U-Bessel (27050)","offer_id":43651454402789,"sku":"CHR-27050-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ B-Bessel (27052)","offer_id":43651454435557,"sku":"CHR-27052-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ V-Bessel (27051)","offer_id":43651454468325,"sku":"CHR-27051-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ R-Besse(27053)","offer_id":43651454501093,"sku":"CHR-27053-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ I-Bessel(27054)","offer_id":43651454533861,"sku":"CHR-27054-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ U-Bessel (27050)","offer_id":43651454566629,"sku":"CHR-27050-50S","price":1015.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ B-Bessel (27052)","offer_id":43651454599397,"sku":"CHR-27052-50S","price":1015.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ V-Bessel (27051)","offer_id":43651454632165,"sku":"CHR-27051-50S","price":1015.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ R-Besse(27053)","offer_id":43651454664933,"sku":"CHR-27053-50S","price":1015.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ I-Bessel(27054)","offer_id":43651454697701,"sku":"CHR-27054-50S","price":1015.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-bessel-ubvri-individual-filters-astronomy-plus_ae74472a-6588-4fd0-8935-455a0cea3ced.png?v=1690483381"},{"product_id":"chroma-jovian-methane-filter","title":"Chroma Jovian Methane Filter","description":"\u003ch2\u003eChroma Jovian Methane Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma Jovian Methane Filter is a methane absorption band filter. This filter enhances contrast when imaging objects containing significant levels of methane. Methane-rich components, such as in the atmosphere of the Jovian planets, will appear darker.\u003c\/p\u003e\n\u003cp\u003eChroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items.\u003c\/p\u003e\n\u003cp\u003eHighly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request.\u003c\/p\u003e\n\u003cp\u003eChroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMethane absorption band filter. This filter enhances contrast when imaging objects containing significant levels of methane. Methane-rich components, such as in the atmosphere of the Jovian planets, will appear darker.\u003c\/li\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eT: ≥ 96%@889nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFWHM = 18nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma Jovian Methane Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43652005920997,"sku":"CHR-27012-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43652005953765,"sku":"CHR-27012-2","price":1162.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43652005986533,"sku":"CHR-27012-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43652006019301,"sku":"CHR-27012-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43652006052069,"sku":"CHR-27012-50","price":1092.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43652006084837,"sku":"CHR-27012-50S","price":1106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-jovian-methane-filter-astronomy-plus_869235b8-05cc-425b-97cf-660de43384ab.png?v=1690483381"},{"product_id":"chroma-loglow-light-pollution-filter","title":"Chroma LoGlow Light Pollution Filter","description":"\u003ch2\u003eChroma LoGlow Light Pollution Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma LoGlow Light Pollution Filter blocks common spectral lines from lighting sources. This filter provides balanced color for the visible spectrum while blocking most emission from metal-halide and vapor lamp sources which together contribute to sky glow.\u003c\/p\u003e\n\u003cp\u003eChroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items.\u003c\/p\u003e\n\u003cp\u003eHighly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request.\u003c\/p\u003e\n\u003cp\u003eChroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBlocks common spectral lines from lighting sources. This filter provides balanced color for the visible spectrum while blocking most emission from metal-halide and vapor lamp sources which together contribute to sky glow.\u003c\/li\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eT: ≥ 94% avg. across visible passbands\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking ≥ OD1.4@ metal-halide and vapor lamp lines\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma LoGlow Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43652072734949,"sku":"CHR-27030-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43652072767717,"sku":"CHR-27030-2","price":707.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43652072800485,"sku":"CHR-27030-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43652072833253,"sku":"CHR-27030-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43652072866021,"sku":"CHR-27030-50","price":637.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43652072898789,"sku":"CHR-27030-50S","price":770.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-loglow-light-pollution-filter-astronomy-plus_aeb18fe3-18df-456e-bc22-5af94ab9f898.png?v=1690483381"},{"product_id":"chroma-clear-filter","title":"Chroma Clear Filter","description":"\u003ch2\u003eChroma Clear Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma Clear Filter has an average transmission greater or equal to 97% across the 380-1000nm range.\u003c\/p\u003e\n\u003cp\u003eChroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items.\u003c\/p\u003e\n\u003cp\u003eHighly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request.\u003c\/p\u003e\n\u003cp\u003eChroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eT: ≥ 97% avg., 94% min. 380-1000nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma Clear filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43651806626021,"sku":"CHR-27044-1.25","price":182.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43651806658789,"sku":"CHR-27044-2","price":525.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43651806691557,"sku":"CHR-27044-31","price":182.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43651806757093,"sku":"CHR-27044-36","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43651806789861,"sku":"CHR-27044-50","price":455.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43651806822629,"sku":"CHR-27044-50S","price":490.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-clear-filter-astronomy-plus_db188345-188e-4f1c-b394-e1d52af03d46.png?v=1690483381"},{"product_id":"baader-semi-apo-filter","title":"Baader Semi-APO Filter","description":"\u003ch2\u003eBaader Semi-APO Filter\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTwo filters made into one for maximum brightness\u003c\/li\u003e\n\u003cli\u003eCombines Fringe-Killer with Moon \u0026amp; Skyglow for Semi-APO contrast with refractors\u003c\/li\u003e\n\u003cli\u003eNon-aging sealed coating edges\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBaader's ideal solution for Achromat owners. The Semi-APO works like it's name implies - delivering a very neutral view, while cutting most of the annoying and contrast-robbing violet fringe that plagues all achromats. The Semi-APO filter combines a stronger Fringe Killer coating formula with the Moon\u0026amp;Skyglow Neodymium substrate. The result is similar performance to the Fringe Killer + Moon\u0026amp;Skyglow combination, but with a slightly stronger violet cut - and at an even greater $$ value.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe Semi-APO filter benefits from all the host of world-class Baader filter attributes. The Semi-APO filter is truly the world's most advanced 'minus-violet' type filter in every regard. It's high efficiency and neutral coloration make it practically disappear in use - while making most of the violet fringe disappear! The effects on sharpness, contrast, and aesthetics are remarkable, even with small refractors. The RGB enhancement of the Neodymium substrate actually boosts color contrasts, particularly for Jupiter and Mars.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eAs a side benefit, the Semi-APO filter has also proven to be the best Mars filter we've used - with ALL Telescopes, including large Dobsonians, SCTs, and Apochromats. The unique properties that result from the combination of the Fringe Killer's blue wavelength attenuation (attenuation - not total elimination), plus the selective Neodymium RGB passbands, result in a significant contrast enhancement of Martian features. The image retains its natural coloration and brightness, and the optically polished surfaces maintain every bit of the image sharpness, unlike other manufacturer's filters.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe high quality of Baader Planetarium filters permits their use well ahead of the focal plane with no image degradation (ie, for cameras or binoviewers). The inclusion of Baader's renowned UV\/IR Cut coatings on the Semi-APO eliminate UV and IR wavelengths to make it ideal for high-resolution imaging with Webcams, DSLR, and CCD cameras (see the UV\/IR Cut filter below, for more detail on these coatings). The high transmission and fringe reduction work great for both planetary and deep sky imaging.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\" data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-family: 'Libre Franklin', sans-serif; font-style: normal; font-weight: 600; letter-spacing: normal; text-transform: none; font-size: var(--font-size-heading-2); margin-top: 1.875rem; margin-bottom: 0.9375rem; color: #4c4c4c; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; text-align: start; text-indent: 0px; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e1.25\"\u003c\/h2\u003e\n\u003ctable style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1499.53px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eSKU (#)\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e2458398\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eEAN CODE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e4047825009340\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eWEIGHT (KG)\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e0.057\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003ePhantom Coating® Group, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e1 25 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eCCD, Color Correction, IR-Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eBandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-family: 'Libre Franklin', sans-serif; font-style: normal; font-weight: 600; letter-spacing: normal; text-transform: none; font-size: var(--font-size-heading-2); margin-top: 1.875rem; margin-bottom: 0.9375rem; color: #4c4c4c; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; text-align: start; text-indent: 0px; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e2\"\u003c\/h2\u003e\n\u003ctable style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1499.53px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eSKU (#)\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e2458399\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eEAN CODE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e4047825009333\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eWEIGHT (KG)\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e0.062\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003ePhantom Coating® Group, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eCCD, Color Correction, IR-Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eBandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"label\"\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 302.266px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\" class=\"data\"\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli\u003eBaader Planetarium 1.25\"\/2\" Semi APO Filter\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"centerImage\" data-mce-fragment=\"1\"\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\" data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2-Year Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":43571028918501,"sku":"BAA-FSAPO-1 (Baader #2458398)","price":132.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43571028951269,"sku":"BAA-FSAPO-2 (Baader #2458399)","price":238.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/baader-semi-apo-filter-astronomy-plus-1.webp?v=1690483588"},{"product_id":"adm-d-series-universal-100mm-adjustable-ring-set-dupr100","title":"ADM D Series Universal 100mm Adjustable Ring Set (DUPR100)","description":"\u003ch2\u003eADM D Series Single 100mm Adjustable Ring Set\u003c\/h2\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003eThe ADM D Series Universal 100mm Adjustable Ring Set fits D Series saddles. Includes two 100mm (ID) adjustable guide scope rings with large delrin tipped thumb screws mounted to a 7″ D Series universal dovetail bar. Adjustable from 70mm – 90mm.\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"box-sizing: inherit; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); width: 804.824px; margin-bottom: 0px; background: none #ffffff; table-layout: auto; border-right: 0px; border-bottom: 0px; border-left: 0px; border-image: initial; border-top: none; margin-top: 0px; color: #545454; font-family: Radnika, -apple-system, BlinkMacSystemFont, Arial, Helvetica, 'Helvetica Neue', Verdana, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" class=\"woocommerce-product-attributes shop_attributes\"\u003e\n\u003ctbody style=\"box-sizing: inherit; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); text-align: left; border-collapse: collapse;\" class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--weight\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; padding: 11px 20px 11px 0px; font-weight: 600; color: #000000; width: 150px; border: none; line-height: 1.5; font-size: 1rem;\" class=\"woocommerce-product-attributes-item__label\"\u003eWeight\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; padding: 11px 0px; border: none; color: #545454 !important; font-style: normal; line-height: 1.5; font-size: 1rem; font-weight: normal;\" class=\"woocommerce-product-attributes-item__value\"\u003e2 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); text-align: left; border-collapse: collapse; background: none; border-bottom: none;\" class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--dimensions\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; padding: 11px 20px 11px 0px; font-weight: 600; color: #000000; width: 150px; border: none; line-height: 1.5; font-size: 1rem; background: none;\" class=\"woocommerce-product-attributes-item__label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; padding: 11px 0px; border: none; color: #545454 !important; font-style: normal; line-height: 1.5; font-size: 1rem; background: none; font-weight: normal;\" class=\"woocommerce-product-attributes-item__value\"\u003e8 × 6 × 5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003e-2x adjustable guide scope rings\u003cbr\u003e-1x DUP7\u003cbr\u003e-mounting hardware\u003c\/p\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"value\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eADM Lifetime Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cform method=\"post\" enctype=\"multipart\/form-data\" action=\"https:\/\/www.admaccessories.com\/product\/dr75-d-series-ring-set-75mm-adjustable-rings\/\" class=\"cart\"\u003e\n\u003cdiv class=\"product-addon product-addon-add-some-bling\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/form\u003e","brand":"ADM","offers":[{"title":"Default Title","offer_id":43133139419365,"sku":"ADM-DUPR100","price":195.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/adm-d-series-universal-100mm-adjustable-ring-set-dupr100-astronomy-plus-1.webp?v=1690483723"},{"product_id":"tele-vue-bandmate-nebustar-type-ii-filter","title":"Tele Vue Bandmate Nebustar Type II Filter","description":"\u003ch2\u003eTele Vue Bandmate Nebustar Type II Filter\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Bandmate Nebustar Type II Filter is a unique narrowband design specifically for Tele Vue. It’s available in 1.25″ or 2″ mounted format. Unlike other UHC designs, Nebustar blocks red wavelengths normally passed by typical UHC filters. The design eliminates star bloat to produce sharper, more natural looking stars along with enhanced nebulosity. This is a great general-purpose nebula filter for scopes of any size. Astronomik is proud to deliver this exclusive filter through Tele Vue and wishes that customers “enjoy magnificent observing sessions with our most recent development for visual observers: The TeleVue Type 2 Nebustar.”\u003c\/p\u003e\n\u003ch4\u003eBackground\u003c\/h4\u003e\n\u003cp\u003eThe first thing you’ll notice is that these filters are produced for us in Germany by Astronomik. Tele Vue and Astronomik are two relatively small companies that adhere to the same philosophy. Do it better, or don’t do it at all; the products, customer, and night sky deserve it.\u003c\/p\u003e\n\u003cp\u003eDavid Nagler and Gerd Neumann had crossed paths at astronomy shows for years. Both have had their frustrations with the filter business. From passband to thread tolerances, the filter industry seems like the “wild west” of astronomical products. We had been looking to develop a long-term supplier of state-of-the-art, custom filters and approached Astronomik with the idea of reintroducing Tele Vue’s line of premium quality Bandmate filters; guaranteed to perform and fit, with uniformity beyond any competitive brand. Gerd and Eric of Astronomik were excited with the idea of a partnership with Tele Vue. “When we started into Amateur-Astronomy, Tele Vue already was a legendary brand known for its outstanding quality of their telescopes and eyepieces. Today we are proud to team up with them to share our knowledge and experience in filter design and production and bring the best filters possible to all astronomers worldwide.”\u003c\/p\u003e\n\u003cp\u003eThe distinction you’ll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by Tele Vue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" id=\"tab-local_1\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_1\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSize: 1.25″ mounted or 2″ mounted\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" id=\"tab-local_2\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_2\"\u003e\n\u003cp\u003e\u003cspan\u003eBandmate Nebustar Type II Filter\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilter Case\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp\u003eTele Vue 10-Years Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Tele-Vue-Bandmate-Filters-Transmission-Graph.pdf?v=1669922695\" target=\"_blank\"\u003eTele Vue Bandmate Filters Transmission Graph\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"1.25\" mounted","offer_id":43732862468325,"sku":"TV-B2N-0125","price":204.0,"currency_code":"CAD","in_stock":true},{"title":"2\" mounted","offer_id":43732862501093,"sku":"TV-B2N-0200","price":450.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-bandmate-nebustar-type-ii-filter-astronomy-plus-1_eec400cf-7905-402d-ab9d-24d2759a3292.png?v=1690484202"},{"product_id":"tele-vue-bandmate-oiii-filter","title":"Tele Vue Bandmate OIII Filter","description":"\u003ch1\u003eTele Vue Bandmate OIII Filter\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Tele Vue Bandmate OIII Filter passes light from doubly ionized oxygen atoms. As such, it is great for viewing planetary nebulae and supernovae remnants.It’s available in 1.25″ or 2″ mounted format.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eBackground\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe first thing you’ll notice is that these filters are produced for us in Germany by Astronomik. Tele Vue and Astronomik are two relatively small companies that adhere to the same philosophy. Do it better, or don’t do it at all; the products, customer, and night sky deserve it.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDavid Nagler and Gerd Neumann had crossed paths at astronomy shows for years. Both have had their frustrations with the filter business. From passband to thread tolerances, the filter industry seems like the “wild west” of astronomical products. We had been looking to develop a long-term supplier of state-of-the-art, custom filters and approached Astronomik with the idea of reintroducing Tele Vue’s line of premium quality Bandmate filters; guaranteed to perform and fit, with uniformity beyond any competitive brand. Gerd and Eric of Astronomik were excited with the idea of a partnership with Tele Vue. “When we started into Amateur-Astronomy, Tele Vue already was a legendary brand known for its outstanding quality of their telescopes and eyepieces. Today we are proud to team up with them to share our knowledge and experience in filter design and production and bring the best filters possible to all astronomers worldwide.”\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe distinction you’ll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by Tele Vue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cdiv aria-labelledby=\"tab-title-local_1\" role=\"tabpanel\" id=\"tab-local_1\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eSize: 1.25″ mounted or 2″ mounted\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv aria-labelledby=\"tab-title-local_2\" role=\"tabpanel\" id=\"tab-local_2\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eBandmate OIII Filter\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilter Case\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTele Vue 10-Years Warranty\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Tele-Vue-Bandmate-Filters-Transmission-Graph.pdf?v=1669922695\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eTele Vue Bandmate Filters Transmission Graph\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"1.25\" mounted","offer_id":43732876886245,"sku":"TV-B2O-0125","price":200.0,"currency_code":"CAD","in_stock":true},{"title":"2\" mounted","offer_id":43732876919013,"sku":"TV-B2O-0200","price":364.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-bandmate-oiii-filter-astronomy-plus-1_42c420ce-60a1-4111-9ba4-4961cda1ab62.png?v=1690484214"},{"product_id":"tele-vue-bandmate-h-beta-filter","title":"Tele Vue Bandmate H-Beta Filter","description":"\u003ch2\u003eTele Vue Bandmate H-Beta Filter\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Tele Vue Bandmate H-Beta Filter passes the aqua colored hydrogen-beta emission lines found in the Horsehead, California, and other hydrogen emitting nebulae. It is effective for viewing objects that take up the entire field — even when using our wide-angle eyepieces. It’s available in 1.25″ or 2″ mounted format.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eBackground\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe first thing you’ll notice is that these filters are produced for us in Germany by Astronomik. Tele Vue and Astronomik are two relatively small companies that adhere to the same philosophy. Do it better, or don’t do it at all; the products, customer, and night sky deserve it.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDavid Nagler and Gerd Neumann had crossed paths at astronomy shows for years. Both have had their frustrations with the filter business. From passband to thread tolerances, the filter industry seems like the “wild west” of astronomical products. We had been looking to develop a long-term supplier of state-of-the-art, custom filters and approached Astronomik with the idea of reintroducing Tele Vue’s line of premium quality Bandmate filters; guaranteed to perform and fit, with uniformity beyond any competitive brand. Gerd and Eric of Astronomik were excited with the idea of a partnership with Tele Vue. “When we started into Amateur-Astronomy, Tele Vue already was a legendary brand known for its outstanding quality of their telescopes and eyepieces. Today we are proud to team up with them to share our knowledge and experience in filter design and production and bring the best filters possible to all astronomers worldwide.”\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe distinction you’ll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by Tele Vue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003c\/p\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" id=\"tab-local_1\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_1\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSize: 1.25″ mounted or 2″ mounted\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" id=\"tab-local_2\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_2\"\u003e\n\u003cp\u003e\u003cspan\u003eBandmate H-Beta Filter\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilter Case\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp\u003eTele Vue 10-Years Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Tele-Vue-Bandmate-Filters-Transmission-Graph.pdf?v=1669922695\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eTele Vue Bandmate Filters Transmission Graph\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"1.25\" Mounted","offer_id":43732847362277,"sku":"TV-B2H-0125","price":200.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":43732847395045,"sku":"TV-B2H-0200","price":364.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-bandmate-h-beta-filter-astronomy-plus-1_e69b3cd0-06a4-4c9c-8edf-444b2f559993.png?v=1690484214"},{"product_id":"daystar-uv-ir-cut-2-dsiuv2","title":"Daystar UV\/IR Cut 2\" (DSIUV2)","description":"\u003ch2\u003eDaystar UV\/IR Cut 2\"\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe Daystar UV\/IR Cut 2″ reduces the heat load on your filter assembly by absorbing or reflecting UV and\/or I light and transmitting light in the desired visual spectrum. \u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"page\" title=\"Page 1\" data-mce-fragment=\"1\"\u003e\n\u003cdiv class=\"layoutArea\" data-mce-fragment=\"1\"\u003e\n\u003cdiv class=\"column\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTo prevent damage, we recommend using an Energy Rejection Filter on telescopes of 80mm aperture or more, or when tracking the Sun for long periods. This can be a UV\/IR cut filter mounted before the diagonal, or a full aperture red or yellow glass ERF mounted in front of the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWhen to use a Front Mounted ERF\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTelescopes upon which we do not recommend UV\/IR cut filters:\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSome larger aperture (130mm and higher) and\/or all-day tracking applications where the Quark \/ Quantum are susceptible to overheating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSCT telescopes\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePetzval refractors (a concentrated beam will fall upon unknown coatings)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCertain older oil spaced triplets prior to adoption of UV resistant oils.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAny instrument for which the owner is not comfortable with the UV\/IR cut solution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThese users should consider front mount energy rejection.  This is accomplished using a colored glass optical window before the objective or corrector plate.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eA refractor with an aperture of 80mm or less doesn’t require energy rejection.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThis is because the amount of energy collected with 80mm of light just isn’t enough to do damage to your system. 80mm is the size of the palm of your hand.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eYour hand doesn’t spontaneously ignite in the sun – and it’s not transparent like your refractor’s objective is.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAll of your lenses are transparent and do not absorb energy.  A diagonal and the front elements of the QUARK are \u0026gt;99% reflective and doesn’t either.  All of that energy is reflected back out the front of your telescope unmagnified.  Unless your telescope is made of paper, then it is not at-risk for damage with an aperture of 80mm or less.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eThread: M48x0.75 (2″)\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003e2″ UV\/IR Cut Filter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eFilter Box\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDaystar 1-Years Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":43125748465893,"sku":"DAY-DSIUV2","price":175.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/daystar-uvir-cut-2-dsiuv2-astronomy-plus_f2db9bfc-2f06-416f-957c-9d8e040b87e2.jpg?v=1690484517"},{"product_id":"idas-nb1-nebula-booster-filter-h-alpha-h-beta-oiii","title":"IDAS NB1 Nebula Booster Filter H-alpha, H-beta \u0026 OIII","description":"\u003ch2\u003eIDAS NB1 Nebula Booster Filter H-alpha, H-beta \u0026amp; OIII\u003c\/h2\u003e\nThe IDAS NB1 Nebula Booster Filter is a triple line-pass filter (H-alpha, H-beta \u0026amp; OIII) which can be used with one-shot color (OSC) cameras such as DSLR's or astronomical OSC cameras. Passing the red Hα+NII and the green-blue Hβ+OIII lines, the NB1 filter enhances the contrast of emission line nebulae without the time-consuming use of single-band filters. IDAS NB Filters are designed to enhance the contrast of emission nebula, yet accommodate the filter spectral shift*when used with modern fast optical systems. All interference filters are subject to a bandpass spectral shift which depends on the angle of incidence of the incoming light. IDAS NB filters are designed to accommodate the spectral shift of modern fast optical systems. When placed in front of an optical system, the spectral shift is determined by the focal length of the optics and the size of the imaging sensor. For an APS-C sensor, up to a 50mm focal length can be accommodated. For a full-frame sized sensor, up to an 80mm focal length can be used. For filters placed between the optical system and imaging sensor, the situation is more complex. IDAS NB filters are designed with modern fast optics in mind and can accommodate an angle of incidence of up to 14°.\n\u003ch4\u003e\u003c\/h4\u003e\n\u003ch4\u003eFeatures\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIdeal flat-top and moderate bandpass\u003c\/li\u003e\n\u003cli\u003eExcellent in-band transmission\u003c\/li\u003e\n\u003cli\u003eExtremely steep bandpass edges minimize internal reflections\u003c\/li\u003e\n\u003cli\u003eNear IR (NIR) is blocked up to 1100nm\u003c\/li\u003e\n\u003cli\u003eAvailable in 52mm and 48mm sizes\u003c\/li\u003e\n\u003cli\u003e2.5mm thickness (parfocal with other IDAS LPS filters)\u003c\/li\u003e\n\u003cli\u003eIDAS-proprietary IGAD\/MBT\/UFPquality\u003c\/li\u003e\n\u003cli\u003eMade in Japan\u003c\/li\u003e\n\u003c\/ul\u003e\nMore on other members of the NB filter family...\n\u003ctable cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\"\u003eEmission Lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\"\u003eNB1\u003c\/td\u003e\n\u003ctd valign=\"middle\"\u003eTriple - Hβ+OIII, Hα\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\"\u003eNB2\u003c\/td\u003e\n\u003ctd valign=\"middle\"\u003eDual - OIII, Hα\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\"\u003eNB3\u003c\/td\u003e\n\u003ctd valign=\"middle\"\u003eDual - OIII, SII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch4\u003eIDAS Filter Technology\u003c\/h4\u003e\nA chain is only as good as its weakest link. This applies as well to an optical system such as a telescope\/filter\/imager system. With this in mind, IDAS filters are manufactured using unique technologies that result in quality that meets or exceeds that of the rest of your optical imaging system:\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIGAD (Ion-Gun Assist Deposition)\u003c\/b\u003e This coating technology was originally developed for the optical communications field where long-term stability (\u0026gt;25 years) over harsh field conditions is required.IDAS is the first manufacturer to apply this technology to astronomical filters. This results in superior filters with robust coatings and long-term spectral stability even under temperature and humidity extremes. This stability is especially important for bandpass curves with steep slopes such as H-alpha, LPS filters, and other narrow bandpass filters. IGAD filters virtually eliminate bandpass shifts from the +\/-3 or 4nm typical of standard coating filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMBT (Multi Band-pass Technology)\u003c\/b\u003e This is technology originally developed for biomedical microscopes, but improved by IDAS by combining it the IGAD hard-coating technology described above. The excellent filter responses possible with this technology allows IDAS to create very complicated filters for astronomical use such as the unique LPS filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUFP (Ultra Fine Polish) Finishing\u003c\/b\u003e IDAS filters are polished twice as long as is typical for optical glass. In combination with the use of high-quality substrate glass, no scratches, bubbles, or other defects are visible even under microscopic inspection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNB1 Filter\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eIDAS 3-Year Warranty\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"48mm mounted (2mm thickness)","offer_id":45659500839141,"sku":"IDA-NB1-48ST2","price":245.0,"currency_code":"CAD","in_stock":true},{"title":"ZWO Cameras","offer_id":43673497665765,"sku":"IDA-NB1-ZF","price":245.0,"currency_code":"CAD","in_stock":true},{"title":"DS for use with IDAS AD42-DSS","offer_id":47818781491429,"sku":"IDA-NB1-DS","price":297.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/products\/IDAS-NB1-Nebula-Booster-Filter-1.webp?v=1668192318"},{"product_id":"idas-heuib-ii-h-alpha-enhanced-uv-ir-cut-filter","title":"IDAS HEUIB-II H-alpha Enhanced UV\/IR Cut Filter","description":"\u003ch2\u003eIDAS HEUIB-II H-alpha Enhanced UV\/IR Cut Filter\u003c\/h2\u003e\n\u003cdiv\u003eThe IDAS HEUIB-II (\u003cstrong\u003eH\u003c\/strong\u003e-α \u003cstrong\u003eE\u003c\/strong\u003enhanced \u003cstrong\u003eU\u003c\/strong\u003eV \u003cstrong\u003eI\u003c\/strong\u003eR \u003cstrong\u003eB\u003c\/strong\u003elocking) filter is designed for enhanced spectrum DSLR's and one-shot color CCD astronomical cameras.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eBesides removing the IR and UV ends of the spectrum which are often out of focus in refractive optics, it isolates the common H-alpha line relative to the surrounding extreme red end of the spectrum, making it easy to bring out the faint H-alpha emission nebulosity of astronomical photos, yet retain the background color balance of broadband photos. Some comparison shots taken with the enhanced Canon 6DH (standard Canon UV\/IR blocking filter vs. HEUIB-II filter) show a clear difference both in background sky color balance and contrast of H-alpha nebulosity in the extremely faint object IC1396. Note the good background color balance as shown in the histograms of the individual color channels of the HEUIB-II filtered image. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003cimg style=\"float: none;\" height=\"252\" width=\"445\" src=\"https:\/\/www.sciencecenter.net\/hutech\/idas\/heuib-2\/heuib-ii-s.jpg\" alt=\"IDAS HEUIB-II filter bandpass plot\"\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003eThe HEUIB-II filter also returns normal daylight color balance to spectrum-enhanced cameras as can be seen in this photo at right taken with normal DSLR auto-white-balance (AWB).\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch4\u003eIDAS Filter Technology\u003c\/h4\u003e\n\u003cp\u003eA chain is only as good as its weakest link. This applies as well to an optical system such as a telescope\/filter\/imager system. With this in mind, IDAS filters are manufactured using unique technologies that result in quality that meets or exceeds that of the rest of your optical imaging system:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIGAD (Ion-Gun Assist Deposition)\u003c\/b\u003e This coating technology was originally developed for the optical communications field where long-term stability (\u0026gt;25 years) over harsh field conditions is required. IDAS is the first manufacturer to apply this technology to astronomical filters. This results in superior filters with robust coatings and long-term spectral stability even under temperature and humidity extremes. This stability is especially important for bandpass curves with steep slopes such as H-alpha, LPS filters, and other narrow bandpass filters. IGAD filters virtually eliminate bandpass shifts from the +\/-3 or 4nm typical of standard coating filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMBT (Multi Band-pass Technology)\u003c\/b\u003e This is technology originally developed for biomedical microscopes, but improved by IDAS by combining it the IGAD hard-coating technology described above. The excellent filter responses possible with this technology allows IDAS to create very complicated filters for astronomical use such as the unique LPS filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUFP (Ultra Fine Polish) Finishing\u003c\/b\u003e IDAS filters are polished twice as long as is typical for optical glass. In combination with the use of high-quality substrate glass, no scratches, bubbles, or other defects are visible even under microscopic inspection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eIdeal precision prime focus T-Adapter for your astro imaging\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSCA Provides 360 deg. rubber square rings contact for the most secure and reliable adaption in your focuser\u003c\/li\u003e\n\u003cli\u003eSCA Brings your Camera to the Closest Optical Axis in the Drawtube\/Visual back for BEST Imaging Result\u003c\/li\u003e\n\u003cli\u003eSCA Eliminates Drawtube\/Visual Back Slop\u003c\/li\u003e\n\u003cli\u003eSCA Eliminates unstable locking from thumbscrew or unified compression ring\u003c\/li\u003e\n\u003cli\u003eSCA Accepts the Imperfection of a Drawtube\/Visual Back\u003c\/li\u003e\n\u003cli\u003eShort SCA Profile Prevents Oscillation\u003c\/li\u003e\n\u003cli\u003eSCA Damps Vibration\u003c\/li\u003e\n\u003cli\u003eSCA Accepts Filter Thread device.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specification\u003cbr\u003e\n\u003c\/h3\u003e\n\u003ctable border=\"0\" cellspacing=\"0\"\u003e\n\u003ccolgroup width=\"174\"\u003e\u003c\/colgroup\u003e \u003ccolgroup width=\"199\"\u003e\u003c\/colgroup\u003e \u003ccolgroup width=\"464\"\u003e\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"18\"\u003e\u003cb\u003e\u003cspan style=\"color: #000000;\"\u003eType\u003c\/span\u003e\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cb\u003e\u003cspan style=\"color: #000000;\"\u003eModel\u003c\/span\u003e\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cb\u003e\u003cspan style=\"color: #000000;\"\u003eUse \u0026amp; Thickness\u003c\/span\u003e\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"33\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003ca href=\"https:\/\/idas.uno\/space\/en\/IDAS\/frames\/m48.htm\"\u003eM48\u003c\/a\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II 48S \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eM48mm P0.75mm, substrate thickness 2.5mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"33\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003ca href=\"https:\/\/idas.uno\/space\/en\/IDAS\/frames\/m48.htm\"\u003eM48\u003c\/a\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II 48ST2 \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eM48mm P0.75mm, substrate thickness 2.0mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"33\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003ca href=\"https:\/\/idas.uno\/space\/en\/IDAS\/frames\/m52.htm\"\u003eM52\u003c\/a\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II 52ST2 \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eM52mm P0.75mm, substrate thickness 2.0mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"18\"\u003e\u003cspan style=\"color: #000000;\"\u003eDi2\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II Di2 \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003edrops in AD19.4 drop-in mount adapter\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"33\"\u003e\u003cspan style=\"color: #000000;\"\u003eZF\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II DRE \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003efor use with ZWO cams (fb 6.5mm) and also IDAS AD19.4 drop-in filter mount\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"62\"\u003e\u003cspan style=\"color: #000000;\"\u003eDRE\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II ZF \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003efor Canon EF-EOSR drop-in mount adapter \u0026amp; Meike MK-EFTR-C (EF-R) \u0026amp; MK-EFTE-C (EF-E) drop-in mount adapters - Details at:\u003ca href=\"https:\/\/idas.uno\/space\/en\/support\/DRE-manual-en.pdf\"\u003e IDAS DRE Filter\u003c\/a\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIdas HEUIB-II Filter at selected size :\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eM48 S\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eM48 ST2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eM52\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDi2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eZF\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eDRE\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eIDAS 3-Year Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"IDAS","offers":[{"title":"48mm (2 mm thickness)","offer_id":43673215959269,"sku":"IDA-HEUIBII-48ST2","price":245.0,"currency_code":"CAD","in_stock":true},{"title":"52mm (2 mm thickness)","offer_id":43673216024805,"sku":"IDA-HEUIBII-52ST2","price":277.0,"currency_code":"CAD","in_stock":true},{"title":"Di2 drop in filter","offer_id":43673215992037,"sku":"IDA-HEUIBII-Di2","price":277.0,"currency_code":"CAD","in_stock":true},{"title":"DRT for EF-EOSR","offer_id":43673216057573,"sku":"IDA-HEUIBII-DRT","price":347.0,"currency_code":"CAD","in_stock":true},{"title":"ZF for ZWO Cameras","offer_id":43673216090341,"sku":"IDA-HEUIBII-ZF","price":245.0,"currency_code":"CAD","in_stock":true},{"title":"DZ for use with ZWO cams","offer_id":47817048162533,"sku":"IDA-HEUIBII-DZ","price":297.0,"currency_code":"CAD","in_stock":true},{"title":"DS for use with IDAS AD42-DS","offer_id":47817048621285,"sku":"IDA-HEUIBII-DS","price":297.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/idas-heuib-ii-h-alpha-enhanced-uvir-cut-filter-astronomy-plus.webp?v=1690484525"},{"product_id":"zwo-uv-ir-cut-filter","title":"ZWO UV\/IR Cut Filter","description":"\u003ch2\u003eZWO UV\/IR Cut Filter\u003c\/h2\u003e\n\u003cp\u003eThe ZWO UV\/IR Cut Filter  filter is suitable for color camera with AR protect window. It’s available in 1.25″ or 2″ round mounted sizes.\u003c\/p\u003e\n\u003cp\u003eThe ZWO UV\/IR Cut Filter blocks infrared light from reaching the sensor of your CCD or CMOS camera or your expensive H-alpha filter. When imaging, the addition of this simple and inexpensive accessory will result in sharper images, and when doing solar work, the IR Cut Filter will your protect H-alpha filter from the damaging effects of infrared radiation.\u003c\/p\u003e\n\u003cp\u003eInfrared or IR light is invisible to the human eye, and so even though most telescopes are not designed to focus IR light, it does not matter when you are using your telescope visually. However, when you add a camera to the mix, its a whole other story! Unlike the human eye, a silicon sensor is very sensitive to light in the infrared portion of the spectrum, and that is a problem because infrared images are blurry as all get out. That means your nice, sharp visual light image is degraded by the addition of the infrared layer. This problem can easily be solved by blocking the infrared, and this filter will do just that.\u003c\/p\u003e\n\u003cp\u003eThe ZWO UV\/IR Cut Filter filter is housed in a 1.25” cell, and has internal threads so that you can stack filters together. The filter comes with a protective plastic case.\u003c\/p\u003e\n\u003cp\u003eThickness: 1.85 mm\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25″ Round Mounted\n\u003cp\u003e2″ Round Mounted\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/fr\/pages\/zwo-warranty?_pos=1\u0026amp;_psq=zwo+warranty\u0026amp;_ss=e\u0026amp;_v=1.0\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Years Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/pages\/zwo-guides-and-manuals\" rel=\"noopener\" target=\"_blank\"\u003eZWO General Product \u0026amp; Software Manuals\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"1.25\" Mounted","offer_id":43768382882021,"sku":"ZWO-IRCUT1.25","price":31.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":43768382914789,"sku":"ZWO-IRCUT2","price":69.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/3e6fe3121596977d2c0d419fbbbf882f.webp?v=1777044037"},{"product_id":"zwo-h-alpha-oiii-sii-7nm-narrowband-sho-filter-set","title":"ZWO 7nm Narrowband SHO Filters (Ha, OIII \u0026 SII)","description":"\u003ch2\u003eZWO 7nm SHO Narrowband Filters (Ha, OIII \u0026amp; SII)\u003c\/h2\u003e\n\u003cp\u003eThe ZWO SHO Narrowband Filter Set contains one H-alpha, one OIII and one SII filter. Use it for tricolor CCD astrophotography. Available in 1.25″ \u0026amp; 2″ round mounted sizes as well as 31mm \u0026amp; 36mm round unmounted sizes.\u003c\/p\u003e\n\u003cp\u003eThe ZWO H-alpha 7nm Narrowband Filter has a bandpass of  7nm and passes light at 656nm  wavelength, light transmission rate comes up to 90%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it!\u003c\/p\u003e\n\u003cp\u003eThe ZWO OIII 7nm Narrowband Filter is designed for nebula observation allowing the 7nm bandwidth of light centered on a wavelength of 500nm through,  which corresponds to OIII emission lines, blocking out all other light.  Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favorite nebulas in a totally new light, no matter how polluted your skies may be!\u003c\/p\u003e\n\u003cp\u003eThe ZWO SII 7nm Narrowband Filter passes light at 672nm wavelength with a bandpass of 7nm which is designed for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants, use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor CCD astrophotography.\u003c\/p\u003e\n\u003cp\u003eNarrowband filter does not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp\u003eIt can reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/0b7561e863701da396bce2092bc696ec.webp?v=1752870758\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4\u003eNew vs Old Filters\u003c\/h4\u003e\n\u003cp\u003eNew Ha filter is based on the new base glass, less reflection( less halo of bright stars).\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eWe made a test of our Ha Filters (ASI1600 mono camera, single frame, 300s, DDP in MaximDL) :\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/0c2508e6ce1e835958f976b9e417026a.webp?v=1752870720\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eNew OIII filter is based on the same base glass, new coating standard, better block rate of off-band.\u003c\/p\u003e\n\u003cp\u003eNew SII filter is based on the new base glass, less reflection( less halo of bright stars).\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7±0.5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25″ Round Mounted\n\u003cp\u003e31mm Round Unmounted\u003c\/p\u003e\n\u003cp\u003e36mm Round Unmounted\u003c\/p\u003e\n\u003cp\u003e2″ Round Mounted\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGlass Thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.0+\/-0.03 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePolishing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/4 wavefront over the both surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmission\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAbout 90% at SII line 672nm\n\u003cp\u003e\u0026lt;0.1% transmission of off-band, OD3(Optical Density)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIR-Cut\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e700-1100nm cut-off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFilter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCase\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/fr\/pages\/zwo-warranty?_pos=1\u0026amp;_psq=zwo+warranty\u0026amp;_ss=e\u0026amp;_v=1.0\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Years Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/pages\/zwo-guides-and-manuals\" rel=\"noopener\" target=\"_blank\"\u003eZWO General Product \u0026amp; Software Manuals\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ZWO-Narrowband-Filters-Transmission-Curves.pdf?v=1670868994\" target=\"_blank\"\u003eZWO Narrowband Filters Transmission Curves\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Filter Set (SHO) \/ 1.25\" Mounted","offer_id":43760428515557,"sku":"ZWO-NB7nm1.25","price":517.0,"currency_code":"CAD","in_stock":true},{"title":"Filter Set (SHO) \/ 31mm Unmounted","offer_id":46386674696421,"sku":"ZWO-NB7nmD31","price":591.0,"currency_code":"CAD","in_stock":true},{"title":"Filter Set (SHO) \/ 36mm Unmounted","offer_id":43760428581093,"sku":"ZWO-NB7nmD36","price":671.0,"currency_code":"CAD","in_stock":true},{"title":"Filter Set (SHO) \/ 2\" Mounted","offer_id":43760428613861,"sku":"ZWO-NB7nmD2","price":979.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 1.25\" Mounted","offer_id":43760428646629,"sku":"ZWO-OIII7nm1.25","price":181.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 31mm Unmounted","offer_id":46386674729189,"sku":"ZWO-OIII7nmD31","price":207.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 36mm Unmounted","offer_id":43760428712165,"sku":"ZWO-OIII7nmD36","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 2\" Mounted","offer_id":43760428744933,"sku":"ZWO-OIII7nmD2","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"H-Alpha \/ 1.25\" Mounted","offer_id":43760428777701,"sku":"ZWO-Ha7nm1.25","price":181.0,"currency_code":"CAD","in_stock":true},{"title":"H-Alpha \/ 31mm Unmounted","offer_id":46386674761957,"sku":"ZWO-Ha7nm31","price":203.0,"currency_code":"CAD","in_stock":true},{"title":"H-Alpha \/ 36mm Unmounted","offer_id":43760428843237,"sku":"ZWO-Ha7nmD36","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"H-Alpha \/ 2\" Mounted","offer_id":43760428876005,"sku":"ZWO-Ha7nm2","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur II \/ 1.25\" Mounted","offer_id":43760428908773,"sku":"ZWO-SII7nm1.25","price":181.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur II \/ 31mm Unmounted","offer_id":46386674794725,"sku":"ZWO-SII7nm31","price":207.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur II \/ 36mm Unmounted","offer_id":43760428974309,"sku":"ZWO-SII7nmD36","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur II \/ 2\" Mounted","offer_id":43760429007077,"sku":"ZWO-SII7nm2","price":349.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/zwo-h-alpha-oiii-and-sii-7nm-narrowband-sho-filters-astronomy-plus-1_32f6c439-47b7-4af3-a15f-bedf87b1d1fe.jpg?v=1690484789"},{"product_id":"zwo-ir-850nm-pass-filter-1-25-850ir125","title":"ZWO IR 850nm Pass Filter 1.25\" (850IR125)","description":"\u003ch2\u003eZWO IR 850nm Pass Filter 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe ZWO IR 850nm Pass Filter 1.25″ suitable for IR sensitive cameras. The transmission properties of the IR 850nm Pass Filter are optimized for CCD \u0026amp; CMOS astrophotography. You don’t need to debayer and get the full resolution of this sensor when use it with a Color camera such like ASI224MC or ASI185MC. Because the QE responce  of sensor beyond 850nm  is all the same. So you can use a color camera as mono camera with this filter, just don’t forget to keep the WB_R and WB_B to 50 (no White Balance applied).\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25″ Round Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.9-2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/fr\/pages\/zwo-warranty?_pos=1\u0026amp;_psq=zwo+warranty\u0026amp;_ss=e\u0026amp;_v=1.0\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Years Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/pages\/zwo-guides-and-manuals\" rel=\"noopener\" target=\"_blank\"\u003eZWO General Product \u0026amp; Software Manuals\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ZWO-IR-850nm-Pass-Filter-Transmission-Curve.pdf?v=1670872908\" target=\"_blank\"\u003eZWO IR 850nm Pass Filter Transmission Curve\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":43133298475237,"sku":"ZWO-850IR1.25","price":31.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/zwo-ir-850nm-pass-filter-1-25-850ir125-astronomy-plus_480fee97-349f-44d1-86ed-179912ae6977.jpg?v=1690484816"},{"product_id":"zwo-methane-ch4-filter-1-25-ch4","title":"ZWO Methane CH4 Filter 1.25\" (CH4)","description":"\u003ch2\u003eZWO Methane CH4 Filter 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe ZWO Methane CH4 Filter 1.25″ is a special filter for photographic use.\u003c\/p\u003e\n\u003cp\u003eIts FWHM is 20 nm which is suitable for most IR sensitive color or mono cameras.It can reveal the detail of the target and not too dark.\u003c\/p\u003e\n\u003cp\u003eIt is recommended  for planetary imaging such like Jupiter, Saturn and the other planets.\u003c\/p\u003e\n\u003cp\u003eThis filter is a 1.25″(31.7mm) filter and comes with an inner filter thread . It is protected in a plastic case.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25″ Round Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTBD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCH4 Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/fr\/pages\/zwo-warranty?_pos=1\u0026amp;_psq=zwo+warranty\u0026amp;_ss=e\u0026amp;_v=1.0\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Years Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/pages\/zwo-guides-and-manuals\" rel=\"noopener\" target=\"_blank\"\u003eZWO General Product \u0026amp; Software Manuals\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":43125760262373,"sku":"ZWO-CH4","price":139.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/zwo-methane-ch4-filter-1-25-ch4-astronomy-plus-1_2d753639-1969-4801-8fcc-df4b3f150f9a.jpg?v=1690484817"},{"product_id":"daystar-calcium-h-line-quark-filter-dszch","title":"Daystar Calcium H-Line Quark Filter (DSZCH)","description":"\u003ch2\u003eDaystar Calcium H-Line Quark Filter\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThis All-In-One design marries high quality components of adapters, snouts and Daystar calcium filter into one simple assembly. Through design efficiency and optimization, now users can enjoy the known high quality optics of Daystar at an affordable price.\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCalcium H line (3968.5Å), approx 5Å FWHM.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1.25″ eyepiece snout with safety indent slot directly into your diagonal or focuser\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eStandard 1.25 eyepiece drawtube output with optional 2″ accessories available.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBrass compression ring to protect eyepiece. Uses USB power, 5v 1.5amp Includes 90-240VAC wall adapter with international plug adapters.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOptional 8-hour battery pack available.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIntegrated 25mm blocking filter, 21mm clear filter aperture. No barlow or focusing elements included.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBest performance with F\/7 – F\/30 refractors full aperture.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFull disk viewing possible on refractors up to ~1800mm focal length\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eNo aperture limitations. May be used on larger refractors for higher magnification views\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eShips in convenient Twist-Case for safe, dust-free storage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy H-line?\u003c\/h3\u003e\n\u003cdiv style=\"text-align: left;\"\u003eMany astronomers forget that the Calcium H-line and K-line yield virtually identical views of the Sun. Solar researchers who only image the Sun with CCD cameras often choose the K-Line for purely research purposes. Sadly, with Calcium K-line filters, many older astronomers are unable to see the lower wavelength and miss out on all the fun. We offer higher wavelength Calcium H-line filters for visual observers so that most clients can enjoy Calcium! [caption id=\"attachment_9331\" align=\"aligncenter\" width=\"600\"]\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003eDayStar Calcium H-Line Quark through 100mm F15 achromat on Dec 15, 2015 using Pt Grey BFLY-PGE-23S6M-C camera; 2ms exposure, RegiStax of best 10 frames out of 100[\/caption] [caption id=\"attachment_9333\" align=\"aligncenter\" width=\"526\"]\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003eDayStar Calcium H-Line Quark through 100mm F15 achromat on Dec 15, 2015 using Pt Grey BFLY-PGE-23S6M-C camera; 22ms exposure, RegiStax of best 10 frames out of 100[\/caption]\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eThe Daystar Calcium Quark is for use on F\/7 or longer focal ratio refractors, the user needn't worry about configurations. Just insert in your diagonal, add an eyepiece and view. Short focal ratio refractors will need a 2x or 2.5x Powermate to get the best performance.\u003c\/li\u003e\n\u003cli\u003e Exact filter bandpass will vary based on final telescope application. No specific FWHM bandpass is designated, but it will be around 5Å. The fully optimized design eliminates the need for any adapters. It's all combined in one lightweight eyepiece sized device.\u003c\/li\u003e\n\u003cli\u003eThe new, compact design configuration eliminates unnecessary components, weight and associated costs. We even reduced power consumption, so the Quark can now operate all day off a small, palm-sized optional battery pack.\u003c\/li\u003e\n\u003cli\u003eNot compatible with red or yellow glass ERFs. Recommended for use with a UV\/IR cut filter for safety. Users need to purchase an Energy Rejection Filter specific to their telescope for safe operation. The Calcium Quark can NOT be used with front mount ERF.\u003c\/li\u003e\n\u003cli\u003eBaffles have been added to increase contrast and AR coatings are optimized for the 397nm wavelength. We even reduced power consumption, so the Quark can now operate all day off an optional small, palm-sized battery pack.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e*The QUARK* assembly is a product of DayStar Instruments, using DayStar Filters' Fabry Perot etalon technology.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditionnal Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe Calcium Quark brings quick, easy fun of the Original Quark to Calcium H-Line.\u003c\/li\u003e\n\u003cli\u003eFor use on refractors of F\/7 or longer focal ratio refractors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWavelength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3968.5Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTuning knob\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWing shift +\/- 0.5Å in 0.1Å increments.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eF\/7 to F\/30 Refractor telescopes in full aperture.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBack Focus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRequires refocusing 61, 67, or 99mm inwards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlocking Filter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrated 25mm blocking filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClear Aperture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e19mm clear etalon aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull Disk\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePasses full solar disk for focal lengths under ~1800mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture Limit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone, usable on large telescopes for high magnification\n\u003cp\u003eFor apertures over 80mm, suggest UV\/IR cut filter\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSun Side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25” snout, 1.25” extension snout, or 2” snout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEyepiece side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25” female drawtube\n\u003cp\u003eBrass compression ring to protect eyepiece\u003c\/p\u003e\n\u003cp\u003eOptional 2″ and SCT accessories available\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSB power, 5v 1.5amp, female Micro-B connector\n\u003cp\u003ePower is required for proper operation\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWall adapter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e90-240VAC wall adapter, includes US, UK, Euro and Australian plugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOpt. battery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e” Optional 8-hour battery pack available”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLED indicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYellow: temperature settling\n\u003cp\u003eGreen: ready to observe, filter on band\u003c\/p\u003e\n\u003cp\u003eRed: fault such as low voltage\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSettling time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApproximately 5-15 minutes after power up or change of wing shift\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAmbient temperature range 40°-100°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55mm diameter x 71mm x 91mm long\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTBD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eQuark Filter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eWall Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eUSB Power Cord\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eCase\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDaystar 5-Years Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Daystar-Calcium-Quark-Manual.pdf?v=1668099644\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eDaystar Calcium Quark Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":43133301915877,"sku":"DAY-DSZCH","price":1813.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/daystar-calcium-h-line-quark-filter-dszch-astronomy-plus_e4f772c7-8313-4534-b4fc-2b5279f8c847.png?v=1690484848"},{"product_id":"daystar-combo-quark-prominence-h-alpha-filter-dszcp","title":"Daystar Combo Quark Prominence H-alpha Filter (DSZCP)","description":"\u003ch2\u003eDaystar Combo Quark Prominence H-alpha Filter\u003c\/h2\u003e\nThe Daystar Combo Quark Prominence H-alpha Filter marries high quality components of adapters, snouts and Daystar hydrogen alpha filter into one simple assembly. Through design efficiency and optimization, now users can enjoy the known high quality optics of DayStar* at an affordable price. Quark* is available in a choice of \"prominence\" or \"chromosphere\". Exact filter bandpass will vary based on final telescope application, so QUARK* assemblies are qualified to show either prominence or surface (chromosphere).  No specific FWHM bandpass is designated.  Now observers can buy a filter based on their desired observing goals instead of their budget.  Choose for WIDER prominences with a little surface or MORE surface contrast (Chromosphere) and narrower prominences. Both are available for the same low price!\n\u003cul\u003e\n\u003cli\u003eFor use on SCTs, Maks, or refractors of F\/15 to F\/30. The user needn't worry about configurations. Just insert Quark in your diagonal, add an eyepiece and view.\u003c\/li\u003e\n\u003cli\u003eSCT and Mak users need to purchase an Energy Rejection Filter specific to their telescope for safe operation.\u003c\/li\u003e\n\u003cli\u003eSCT owners must employ a front mount, off-axis, aperture reduced Energy Rejection Filter (ERF) in order to achieve optimum performance. This front mount ERF will generate a slower focal ratio through aperture reduction while preventing heat build-up in the optical tube assembly.\u003c\/li\u003e\n\u003cli\u003eMaktsutov owners who operate at a native ~F\/15 focal ratio do not need to reduce the aperture of the telescope, but must use front mount energy rejection to prevent overheating of the optical tube assembly.\u003c\/li\u003e\n\u003cli\u003eExact filter bandpass will vary based on final telescope application, so QUARK assemblies are qualified to show either prominences or surface (chromosphere). No specific FWHM bandpass is designated.\u003c\/li\u003e\n\u003cli\u003eNow observers can buy a filter based on their desired observing goals instead of their budget. Choose prominences and surface (Chromosphere) detail. Both are available for the same low price! The fully optimized design eliminates the need for any adapters. It's all combined in one lightweight eyepiece sized device.\u003c\/li\u003e\n\u003cli\u003eThe new, compact design configuration eliminates unnecessary components, weight and associated costs.\u003c\/li\u003e\n\u003cli\u003eBaffles have been added to increase contrast and AR coatings are optimized for the 656nm wavelength. We even reduced power consumption, so the Quark can now operate all day off an optional small, palm-sized battery pack.\u003c\/li\u003e\n\u003cli\u003eNot for use with full aperture SCTs, or damage to your secondary mirror may result. SCTs must use an off axis ERF, sold separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n*The QUARK* assembly is a product of DayStar Instruments, using DayStar Filters' Fabry Perot etalon technology.\n\u003cul\u003e\n\u003cli\u003eFront, male1.25\" eyepiece snout with safety indent slots directly into your diagonal or focuser\u003c\/li\u003e\n\u003cli\u003eIncludes 2° off axis 1.25\" snout adapter for use with off axis SCT and Mak ERFs.\u003c\/li\u003e\n\u003cli\u003eStandard rear female 1.25 eyepiece drawtube output with optional 2\" accessories available.\u003c\/li\u003e\n\u003cli\u003eBrass compression ring to protect your eyepiece. Uses USB power, 5v 1.5amp\u003c\/li\u003e\n\u003cli\u003eIncludes 90-240VAC wall adapter with international plug adapters.\u003c\/li\u003e\n\u003cli\u003eTuning knob allows wing shifting +\/- 0.5à with detents at every 0.1Å LED indicator for power, warming, ready, fault.\u003c\/li\u003e\n\u003cli\u003e5 year warranty\u003c\/li\u003e\n\u003cli\u003eIntegrated 25mm blocking filter, 21mm clear filter aperture.\u003c\/li\u003e\n\u003cli\u003eNo barlow lenses or focusing elements included. This unit is a 0-power filter only.\u003c\/li\u003e\n\u003cli\u003eBest performance with F\/15 - F\/30 refractors or Mak's full aperture; or SCTs and Maks with off axis, aperture reduced ERF.\u003c\/li\u003e\n\u003cli\u003eFull disk viewing possible on refractors up to ~1800mm focal length\u003c\/li\u003e\n\u003cli\u003eNo aperture limitations. May be used on larger refractors for higher magnification views.\u003c\/li\u003e\n\u003cli\u003eShips in convenient Twist-Case for safe, dust-free storage.\u003c\/li\u003e\n\u003cli\u003eOptional 8-hour battery pack available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWavelength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6562.8Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTuning knob\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWing shift +\/- 0.5Å in 0.1Å increments.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot specified. Prominence units are generally 0.6Å or above, Chromosphere units generally 0.5Å or below.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eF\/14 to F\/30 Refractor telescopes in full aperture. SCT or Mak telescopes when used with Off Axis ERF (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackfocus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRequires refocusing 67mm rearwards, 99mm with wedge adapter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlocking filter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrated 25mm blocking filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClear aperture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20mm clear etalon aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull disk\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePasses full solar disk for focal lengths under ~1800mm.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture limit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone, usable on large telescopes for high magnification. For apertures over 80mm*, suggest UV\/IR application before diagonal for Energy Rejection.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSun Side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25” snout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEyepiece side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25” female drawtube.\n\u003cp\u003eBrass compression ring to protect eyepiece.\u003c\/p\u003e\n\u003cp\u003eOptional 2″” and SCT accessories available.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSB power, 5v 1.5amp, female Micro-B connector. Power is required for proper operation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWall adapter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e90-240VAC wall adapter, includes US, UK, Euro and Australian plugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOpt. battery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOptional 8-hour battery pack available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLED indicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYellow: temperature settling\n\u003cp\u003eGreen: ready to observe, filter on band\u003c\/p\u003e\n\u003cp\u003eRed: fault such as low voltage.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSettling time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApproximately 5-15 minutes after power up or change of wing shift\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAmbient temperature range 40°-100°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55mm diameter x 71mm x 91mm long\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eQuark Filter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eWedge Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eWall Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eUSB Power Cord\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eTwist-Case\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDaystar 5-Years Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Daystar-Quark-Flyer.pdf?v=1668026525\" target=\"_blank\"\u003eDaystar Quark Flyer\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Daystar-Combo-Quark-Manual.pdf?v=1668028351\" target=\"_blank\"\u003eDaystar Combo Quark Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":43133310763237,"sku":"DAY-DSZCP","price":1813.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/daystar-combo-quark-prominence-h-alpha-filter-dszcp-astronomy-plus-1.webp?v=1690485164"},{"product_id":"daystar-combo-quark-chromosphere-h-alpha-filter-dszcc","title":"Daystar Combo Quark Chromosphere H-alpha Filter (DSZCC)","description":"\u003ch2\u003eDaystar Combo Quark Chromosphere H-alpha Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Combo Quark Chromosphere H-alpha Filter marries high quality components of adapters, snouts and Daystar hydrogen alpha filter into one simple assembly. Through design efficiency and optimization, now users can enjoy the known high quality optics of DayStar* at an affordable price. Quark* is available in a choice of \"prominence\" or \"chromosphere\". Exact filter bandpass will vary based on final telescope application, so QUARK* assemblies are qualified to show either prominence or surface (chromosphere).  No specific FWHM bandpass is designated.  Now observers can buy a filter based on their desired observing goals instead of their budget.  Choose for WIDER prominences with a little surface or MORE surface contrast (Chromosphere) and narrower prominences. Both are available for the same low price!\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor use on SCTs, Maks, or refractors of F\/15 to F\/30. The user needn't worry about configurations. Just insert Quark in your diagonal, add an eyepiece and view.\u003c\/li\u003e\n\u003cli\u003eSCT and Mak users need to purchase an Energy Rejection Filter specific to their telescope for safe operation.\u003c\/li\u003e\n\u003cli\u003eSCT owners must employ a front mount, off-axis, aperture reduced Energy Rejection Filter (ERF) in order to achieve optimum performance. This front mount ERF will generate a slower focal ratio through aperture reduction while preventing heat build-up in the optical tube assembly.\u003c\/li\u003e\n\u003cli\u003eMaktsutov owners who operate at a native ~F\/15 focal ratio do not need to reduce the aperture of the telescope, but must use front mount energy rejection to prevent overheating of the optical tube assembly.\u003c\/li\u003e\n\u003cli\u003eExact filter bandpass will vary based on final telescope application, so QUARK assemblies are qualified to show either prominences or surface (chromosphere). No specific FWHM bandpass is designated.\u003c\/li\u003e\n\u003cli\u003eNow observers can buy a filter based on their desired observing goals instead of their budget. Choose prominences and surface (Chromosphere) detail. Both are available for the same low price! The fully optimized design eliminates the need for any adapters. It's all combined in one lightweight eyepiece sized device.\u003c\/li\u003e\n\u003cli\u003eThe new, compact design configuration eliminates unnecessary components, weight and associated costs.\u003c\/li\u003e\n\u003cli\u003eBaffles have been added to increase contrast and AR coatings are optimized for the 656nm wavelength. We even reduced power consumption, so the Quark can now operate all day off an optional small, palm-sized battery pack.\u003c\/li\u003e\n\u003cli\u003eNot for use with full aperture SCTs, or damage to your secondary mirror may result. SCTs must use an off axis ERF, sold separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e*The QUARK* assembly is a product of DayStar Instruments, using DayStar Filters' Fabry Perot etalon technology.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFront, male1.25\" eyepiece snout with safety indent slots directly into your diagonal or focuser\u003c\/li\u003e\n\u003cli\u003eIncludes 2° off axis 1.25\" snout adapter for use with off axis SCT and Mak ERFs.\u003c\/li\u003e\n\u003cli\u003eStandard rear female 1.25 eyepiece drawtube output with optional 2\" accessories available.\u003c\/li\u003e\n\u003cli\u003eBrass compression ring to protect your eyepiece. Uses USB power, 5v 1.5amp\u003c\/li\u003e\n\u003cli\u003eIncludes 90-240VAC wall adapter with international plug adapters.\u003c\/li\u003e\n\u003cli\u003eTuning knob allows wing shifting +\/- 0.5à with detents at every 0.1Å LED indicator for power, warming, ready, fault.\u003c\/li\u003e\n\u003cli\u003e5 year warranty\u003c\/li\u003e\n\u003cli\u003eIntegrated 25mm blocking filter, 21mm clear filter aperture.\u003c\/li\u003e\n\u003cli\u003eNo barlow lenses or focusing elements included. This unit is a 0-power filter only.\u003c\/li\u003e\n\u003cli\u003eBest performance with F\/15 - F\/30 refractors or Mak's full aperture; or SCTs and Maks with off axis, aperture reduced ERF.\u003c\/li\u003e\n\u003cli\u003eFull disk viewing possible on refractors up to ~1800mm focal length\u003c\/li\u003e\n\u003cli\u003eNo aperture limitations. May be used on larger refractors for higher magnification views.\u003c\/li\u003e\n\u003cli\u003eShips in convenient Twist-Case for safe, dust-free storage.\u003c\/li\u003e\n\u003cli\u003eOptional 8-hour battery pack available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWavelength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6562.8Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTuning knob\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWing shift +\/- 0.5Å in 0.1Å increments.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot specified. Prominence units are generally 0.6Å or above, Chromosphere units generally 0.5Å or below.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eF\/14 to F\/30 Refractor telescopes in full aperture. SCT or Mak telescopes when used with Off Axis ERF (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackfocus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRequires refocusing 67mm rearwards, 99mm with wedge adapter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlocking filter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrated 25mm blocking filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClear aperture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20mm clear etalon aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull disk\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePasses full solar disk for focal lengths under ~1800mm.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture limit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone, usable on large telescopes for high magnification. For apertures over 80mm*, suggest UV\/IR application before diagonal for Energy Rejection.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSun Side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25” snout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEyepiece side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25” female drawtube.\n\u003cp\u003eBrass compression ring to protect eyepiece.\u003c\/p\u003e\n\u003cp\u003eOptional 2″” and SCT accessories available.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSB power, 5v 1.5amp, female Micro-B connector. Power is required for proper operation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWall adapter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e90-240VAC wall adapter, includes US, UK, Euro and Australian plugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOpt. battery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOptional 8-hour battery pack available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLED indicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYellow: temperature settling\n\u003cp\u003eGreen: ready to observe, filter on band\u003c\/p\u003e\n\u003cp\u003eRed: fault such as low voltage.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSettling time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApproximately 5-15 minutes after power up or change of wing shift\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAmbient temperature range 40°-100°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55mm diameter x 71mm x 91mm long\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eQuark Filter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eWedge Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eWall Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eUSB Power Cord\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eTwist-Case\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDaystar 5-Years Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Daystar-Quark-Flyer.pdf?v=1668026525\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eDaystar Quark Flyer\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Daystar-Combo-Quark-Manual.pdf?v=1668028351\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eDaystar Combo Quark Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":43133310861541,"sku":"DAY-DSZCC","price":1650.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/daystar-combo-quark-chromosphere-h-alpha-filter-dszcc-astronomy-plus-1.webp?v=1690485163"},{"product_id":"daystar-quark-prominence-h-alpha-filter-dsz4p","title":"Daystar Quark Prominence H-alpha Filter (DSZ4P)","description":"\u003ch2\u003eDaystar Quark Prominence H-alpha Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quark Prominence H-alpha Filter marries high quality components of a telecentric barlow, adapters, snouts and Daystar hydrogen alpha filter into one simple assembly.\u003c\/p\u003e\n\u003cp\u003eQuark* is available in a choice of “prominence” or “chromosphere”.\u003c\/p\u003e\n\u003cp\u003eExact filter bandpass will vary based on final telescope application, so QUARK* assemblies are qualified to show either prominence or surface (chromosphere).  No specific FWHM bandpass is designated.  Now observers can buy a filter based on their desired observing goals instead of their budget.  Choose fore WIDER prominences with a little surface or MORE surface contrast (Chromosphere) and narrower prominences. Both are available for the same low price!\u003c\/p\u003e\n\u003cp\u003eAll DayStar Hydrogen a filter assemblies applied on telescopes over 80mm in aperture need to be used in conjunction with an Energy Rejection Filter.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1.25″ or 2.0″ combo eyepiece snouts with safety indent slot directly into your diagonal\u003c\/li\u003e\n\u003cli\u003eStandard 1.25 eyepiece drawtube output with optional 2″ and SCT accessories available.\u003c\/li\u003e\n\u003cli\u003eBrass compression ring to protect eyepiece.\u003c\/li\u003e\n\u003cli\u003eUses USB power, 5v 1.5amp\u003c\/li\u003e\n\u003cli\u003eIncludes 90-240VAC wall adapter with international plug adapters.\u003c\/li\u003e\n\u003cli\u003eTuning knob allows wing shifting +\/- 0.5à with detents at every 0.1Ã\u003c\/li\u003e\n\u003cli\u003eLED indicator for power, warming, ready, fault\u003c\/li\u003e\n\u003cli\u003e5 year warranty,\u003c\/li\u003e\n\u003cli\u003eOptional 8-hour battery pack available.\u003c\/li\u003e\n\u003cli\u003eIntegrated, fully baffled 2 element telecentric 4.2X barlow optimized for 656nm\u003c\/li\u003e\n\u003cli\u003eIntegrated 12mm blocking filter\u003c\/li\u003e\n\u003cli\u003e21mm clear filter aperture\u003c\/li\u003e\n\u003cli\u003eBest performance with F\/4 – F\/8 refractors\u003c\/li\u003e\n\u003cli\u003eFull disk viewing possible on refractors up to ~450mm focal length refractors\u003c\/li\u003e\n\u003cli\u003eNo aperture limitations. May be used on larger refractors for higher magnification views\u003c\/li\u003e\n\u003cli\u003eShips in convenient Twist-Case for safe, dust-free storage.\u003c\/li\u003e\n\u003cli\u003eNot suited for off-axis application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor use on refractors of F\/4 to F\/8**, the user needn’t worry about configurations. Just insert in your diagonal, add an eyepiece and view.\u003c\/p\u003e\n\u003cp\u003eThe patent pending QUARK* contains a custom Daystar Instruments 4.2X telecentric barlow lens fully optimized in coatings and optical design specifically for the Hydrogen Alpha wavelength. This highly specialized telecentric lens offers superior field flatness.\u003c\/p\u003e\n\u003cp\u003eThe fully optimized design eliminates the need for any adapters.  It’s all combined in one lightweight eyepiece sized device. The new, compact design configuration eliminates unnecessary components, weight and associated costs. We even reduced power consumption, so the Quark* can now operate all day off a small, palm-sized optional battery pack. Baffles have been added to increase contrast and AR coatings are optimized for the 656nm wavelength.\u003c\/p\u003e\n\u003cp\u003e*The QUARK* assembly is a product of DayStar Instruments, using DayStar Filters’ Fabry Perot etalon technology.\u003cbr\u003e** QUARK Filters may be used at shorter and longer focal ratios than recommended. F-ratios of F\/9 and higher will offer a dimmer visual view and may only be bright enough for photographic applications. F-ratios of less than F\/4 will be brighter, but also widen the effective FWHM bandpass performance of the QUARK filter.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWavelength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6562.8Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTuning knob\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWing shift +\/- 0.5Å in 0.1Å increments.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot specified. Prominence units are generally 0.6Å or above, Chromosphere units generally 0.5Å or below.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eF\/4 to F\/9 refractor telescopes.\n\u003cp\u003eNot suited for off-axis (SCT or dob) application.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBarlow\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrated, fully baffled 2 element telecentric 4.3X barlow optimized for 656nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlocking filter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrated 12mm blocking filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClear aperture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20mm clear etalon aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull disk\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePasses full solar disk for focal lengths under ~450mm.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture Limit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone, usable on large telescopes for high magnificationFor apertures over 80mm, suggest UV\/IR cut filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSun Side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25” snout or 2” snout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEyepiece side\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25” female drawtube with brass compression ring to protect eyepiece\n\u003cp\u003eOptional 2″ and SCT accessories available\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSB power, 5v 1.5amp, female Micro-B connector\n\u003cp\u003ePower is required for proper operation\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWall adapter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e90-240VAC wall adapter, includes US, UK, Euro and Australian plugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOpt. battery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e” Optional 8-hour battery pack available”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLED indicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYellow: temperature settling\n\u003cp\u003eGreen: ready to observe, filter on band\u003c\/p\u003e\n\u003cp\u003eRed: fault such as low voltage\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSettling time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApproximately 5-15 minutes after power up or change of wing shift\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAmbient temperature range 40°-100°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55mm diameter x 71mm x 146mm long\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTBD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eQuark Filter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eWall Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eUSB Power Cord\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eCase\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDaystar 5-Years Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Daystar-Quark-Flyer.pdf?v=1668026525\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eDaystar Quark Flyer\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Daystar-Combo-Quark-Manual.pdf?v=1668028351\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eDaystar Quark Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":43133311221989,"sku":"DAY-DSZ4P","price":1813.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/daystar-quark-prominence-h-alpha-filter-dsz4p-astronomy-plus-1.webp?v=1690485163"},{"product_id":"optolong-l-pro-filter","title":"Optolong L-Pro Filter","description":"\u003ch1\u003eOptolong L-Pro Filter\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Optolong L-Pro Filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOptolong L-Pro is multi-bandpass filter which offers better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro is the best choice for light pollution suppression.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eMain Use and Performance\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuitable for visual observation and astrophotography.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eL-Pro filter has a very low transmission reduction rate against continuous spectrum space objects, and thus is quite effective in suppressing light pollution sources when shooting galaxies, reflection nebulae and globular star clusters. The same holds true for visual star observations.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eL-Pro filter alone can suppress infrared wavelength, and thus can be used at ease for “L” image shootings with CCDs.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSchott substrate material\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness 2.0 mm (1.25”\/2”\/77mm) | 1.0 mm (Clip series)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt; 30 seconds parallelism over the both surfaces\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHigh transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm\u0026amp;500nm, SII 672nm and H-beta 486nm).\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePrecision off-band blocking, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm).\u003c\/span\u003e \u003c\/p\u003e\n\u003ch4\u003eCoating Technology\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eL-Pro Filter\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\" Mounted","offer_id":43697571135717,"sku":"OL-L-PRO-1.25","price":208.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":43697571168485,"sku":"OL-L-PRO-2","price":278.0,"currency_code":"CAD","in_stock":true},{"title":"Clip for Canon EOS APS-C","offer_id":43697571201253,"sku":"OL-L-PRO-EOS-APS-C","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"Clip for Canon EOS Full Frame","offer_id":43697571234021,"sku":"OL-L-PRO-EOS-FF","price":377.0,"currency_code":"CAD","in_stock":true},{"title":"Clip for Nikon Z full frame","offer_id":48076843188453,"sku":"OL-L-PRO-NK-Z","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"Clip for Nikon Full Frame","offer_id":43697571266789,"sku":"OL-L-PRO-NK-FF","price":377.0,"currency_code":"CAD","in_stock":true},{"title":"Sony Full Frame (2023 Version)","offer_id":43697571332325,"sku":"OL-L-PRO-SN-FF","price":377.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-R","offer_id":46339805970661,"sku":"","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"77mm Round Mounted","offer_id":43697571299557,"sku":"OL-L-PRO-77","price":405.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-l-pro-filter-astronomy-plus-1.webp?v=1690485403"},{"product_id":"optolong-l-enhance-filter","title":"Optolong L-eNhance Duo Band Filter","description":"\u003ch1\u003eOptolong L-eNhance Duo Band Filter\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe relentless spread or urbanization and its associated light pollution have become a growing problem for all amateur astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel. The filter is available in the following sizes: 1.25″, 2″ \u0026amp; clip filter for Canon EOS. The clip version is compatible with all Canon EF lenses, but doesn’t suit Canon EF-S lenses. The following cameras are compatible: 7D2, 80D, 800D, 77D, 70D, 760D, 750D, 700D, 650D, 600D, 550D, 500D, 400D, 100D, 1100D, 1200D \u0026amp; 1300D.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Optolong L-eNhance Filterprovides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and monochrome CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. Optolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eHydrogen is the largest, the most primitive, the simplest, and the oldest element in the universe. Scientists consider that Hydrogen amounts to more than 90% of visible substance in space. Our sun is 5 billion years old, but so far hydrogen is still the key matter of nuclear fusion. While the sulfur element does not have much scientific significance, so keeping H and O is meaning for exploration of life.\u003cbr data-mce-fragment=\"1\"\u003eTherefore, we highlight H-a, H-b, O3 and O2, and reduce the signal of sulfur.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eMain Use and Performance\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuitable for visual observation and astrophotography.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cem\u003e\u003cstrong\u003eL-Enhance Performance\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20210703\/48c07ebe8a88353aa27c0031c7e973d0.png\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSpectrum and Characteristic\u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eSbustrate:\u003c\/em\u003e B270\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cem\u003eThickness:\u003c\/em\u003e 1.85mm\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eTpeak:\u003c\/em\u003e  T\u0026gt;90%\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eBlocking range:\u003c\/em\u003e 300-1000nm\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eBlocking depth:\u003c\/em\u003e light pollution  line blocking \u0026gt;99%\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eSurface quality:\u003c\/em\u003e 60\/40\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eTransmitted Wavefront RMS:\u003c\/em\u003e λ\/4\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eParallelism:\u003c\/em\u003e 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eMajor Emission Lines of Nebulae : \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-Alpha : 656.3nm\u003c\/li\u003e\n\u003cli\u003eH-Beta : 486.1nm\u003c\/li\u003e\n\u003cli\u003eOIII : 495.nm \u0026amp; 500.7 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eOptolong 3-Years Warranty\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697303257317,"sku":"OL-L-ENHANCE-1.25","price":250.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697303290085,"sku":"OL-L-ENHANCE-2","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-C Clip","offer_id":43697303322853,"sku":"OL-L-ENHANCE-EOS","price":362.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-l-enhance-filter-astronomy-plus-1.webp?v=1690485404"},{"product_id":"antares-1-25-variable-neutral-density-filter-3-40-fxp","title":"Antares 1.25\" Variable Neutral Density Filter 3-40% (FXP)","description":"\u003ch2\u003eAntares 1.25\" Variable Neutral Density Filter 3-40%\u003c\/h2\u003e\n\u003cp\u003eNeutral density filters can reduce brightness across the visual spectrum without losing resolution, enhancing lunar-planetary observing. Can be used stacked with color filters.\u003c\/p\u003e\n\u003cp\u003eThe Antares 1.25\" Variable Neutral Density Filter varies transmission from 40%-3% and threads into all 1.25\" accessories. NOT FOR SOLAR VIEWING  \u003c\/p\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\nAntares 1.25\" Variable Neutral Density Filter 3-40% \u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"value\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntares 1-Year Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":43125796733157,"sku":"ANT-FXP","price":42.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antares-1-25-variable-neutral-density-filter-3-40percent-fxp-astronomy-plus.webp?v=1690486229"},{"product_id":"william-optics-48mm-t-mount-for-sony-e-black-tm-sn-e-m48","title":"William Optics 48mm T mount for Sony E - Black (TM-SN-E-M48)","description":"\u003ch2\u003eWilliam Optics 48mm T mount for Sony E - Black\u003c\/h2\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWilliam Optics 48mm T mount for Sony E - Black\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWilliam Optics 2-Year Warranty\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":43125823865061,"sku":"WO-TM-SN-E-M48","price":76.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/william-optics-48mm-t-mount-for-sony-e-black-tm-sn-e-m48-astronomy-plus-1.webp?v=1690486838"},{"product_id":"optolong-l-extreme-dual-band-narrow-band-filter-l-extreme","title":"Optolong L-Extreme Dual-Band Filter","description":"\u003ch1\u003eOptolong L-Extreme Dual-Band Astronomy NarrowBand Filter\u003c\/h1\u003e\n\u003cp\u003eThe advantage of the L-eXtreme filter is that there is no transmission between the H-beta and OIII lines and there are also no nebula emission lines there. In this case, it isn’t letting light pollution come through so it maximizes nebula signals and the sky background is made darker while imaging.\u003c\/p\u003e\n\u003cp\u003eThe L-eXtreme filter should better isolate the emission lines and better protect from light pollution.\u003c\/p\u003e\n\u003ch4\u003eL-Extreme Introduction\u003c\/h4\u003e\n\u003cp\u003eOptolong L-eXtreme is a two 7 nm bandpass filter which can be used with one-shot color cameras like DSLR’s (digital SLR), and monochrome CCD cameras, it is also more suited for fast systems. The convenience and cost-effectiveness of this filter allows amateurs to image a rich emission nebula, even in bright, light pollution skies. Optolong believes the design of L-eXtreme filter would be a better choice for fast systems at a competitive price. It isolates the H-alpha, and Oxygen-iii nebula emission lines so that the contrast and signal-to-noise ratio between nebulae were maximized. For people who are living in very light-polluted areas, or when the moon is out, the L-eXtreme will be a good filter.\u003c\/p\u003e\n\u003cp\u003eUnlike the L-eNhance filter which is a tri-band (transmits H-b, H-a, and O-iii), the L-eXtreme filter is dual-band that passes H-a and O-iii emission lines.\u003c\/p\u003e\n\u003cp\u003eHydrogen is the largest, the most primitive, the simplest, and the oldest element in the universe. Scientists consider that Hydrogen amounts to more than 90% of visible substance in space. Our sun is 5 billion years old, but so far hydrogen is still the key matter of nuclear fusion. While the sulfur element does not have much scientific significance, so keeping H and O for the exploration of life.\u003c\/p\u003e\n\u003cp\u003eTherefore, Optolong highlights H-a, H-b, O-iii, and O-ii, and reduce the signal of sulfur.\u003c\/p\u003e\n\u003ch4\u003eL-eXtreme Performance:\u003c\/h4\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eI. Compare: L-eXtreme VS no filter © Vincent Cheng\u003c\/strong\u003e\u003c\/u\u003e \u003cimg height=\"489\" width=\"457\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/5bcdb1e79c79231df851f9b60f152ba9.png\" class=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eII. NGC6946, Barnard 150 \u0026amp; Sh2-129 Flying Bat nebula ©José Jiménez\u003c\/strong\u003e\u003c\/u\u003e NGC6946, Barnard 150 \u0026amp; Sh2-129 Flying Bat nebula Canon 6D mod \u0026amp; WO SpaceCat 51 RGB 25 x 600\" ISO 3200 - Optolong L-Pro H-Alpha \u0026amp; OIII 20 x 1500\" ISO 3200 -\u003cu\u003e \u003cstrong\u003eOptolong L-eXtreme\u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"252\" width=\"503\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/1840a8e24b716e2297a92bd4aa933ede.jpg\" class=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eIII. The Rosette and Cone Nebulas ©Starizona\u003c\/strong\u003e\u003c\/u\u003e The image of the Rosette and Cone Nebulas is an example under about the worst conditions: a very wide field of view (135mm lens, 8 x 5.5 degrees), a very fast focal ratio (f\/1.8) and with the 58% illuminated moon only 17 degrees outside the field of view!  It is 20 exposures of 90 seconds each with the ZWO ASI294.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"343\" width=\"500\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/5d3cbec016b1e67e43be0157c53c10a8.jpg\" class=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eIV. IC1396 Elephant Trunk nebula ©José Jiménez \u003c\/strong\u003e\u003c\/u\u003e A new job with Optolong L-eXtreme filter and the new Askar Lens FRA 400 tube; IC1396 Elephant Trunk nebula La Jonquera - Girona - Spain May 2020 Equipment used : Canon 6D mod Askar FRA 400mm Sharpstar Optics Fong Michael RGB 6 x 1500\" ISO 6400 \u003cu\u003e\u003cstrong\u003eOptolong L-eXtreme\u003c\/strong\u003e\u003c\/u\u003e Sky Watcher EQ6 Mount Guide camera QHY5 Flats, Darks \u0026amp; Bias Calibrated, stacked and processed with Pixinsight, final tweaks with Lightroom\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"331\" width=\"504\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/fd6ecb8b50249153970ab1b4eb64223e.jpg\" class=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eV. NGC6188 Fighting Dragons of Ara  ©Tommy Lim KW  \u003c\/strong\u003e\u003c\/u\u003e OBJECTS: NGC6188 FIGHTING DRAGONS OF ARA LOCATION: MERSING, JOHOR CAMERA: QHY168C TELESCOPE: 4\" REFRACTOR MOUNT: SKYWATCHER AZ-EQ5GT FILTERS: OPTOLONG L-EXTREME FILTER. EXPOSURE: 30 X 300SEC Stacked in Siril and processed in Pixinsight.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"327\" width=\"508\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/e2b193114d02ba2a75138093d52f0e1c.jpg\" class=\"\"\u003e \u003cstrong\u003eWarm prompt\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAbout color: due to the influence of ambient light, color difference of the display and flash photography, the color of the product may have some color difference. Detailed color is in accordana with the final product.\u003c\/li\u003e\n\u003cli\u003eAbout coating: the interference filter will show different colors under different light, which is a normal phenomenon. Please refer to the material object.\u003c\/li\u003e\n\u003cli\u003eAbout the style: in order to improve the product, the change of design\/appearance\/parameters has not been updated in time. Please see the subject produce.\u003c\/li\u003e\n\u003cli\u003eAbout the description: the series of this product have the same material, technology and design, different sizes only, please note.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch4\u003eSpectrum and Characteristic:\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eSbustrate: B270\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 1.85mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTpeak:  T\u0026gt;90%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking range: 300-1000nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking depth: light pollution  line blocking \u0026gt;99%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSurface quality: 60\/40\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted Wavefront RMS: λ\/4\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e▲The \u003cspan style=\"color: #bc1f1f;\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eRED\u003c\/strong\u003e\u003c\/span\u003e line shows the line of H-alpha.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\" style=\"color: #038b0b;\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eGREEN\u003c\/strong\u003e\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eline shows the emmission of OIII. The artifical emission lines are shown in \u003cspan data-mce-fragment=\"1\"\u003e\u003cspan style=\"color: #ff8000;\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eORANGE\u003c\/strong\u003e\u003c\/span\u003e.\u003c\/span\u003e\u003cimg height=\"110\" width=\"668\" data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" class=\"aligncenter lazyloaded\"\u003e\u003c\/p\u003e\n\u003ch4\u003eCoating Technology\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003ePacking\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Box: silve box\u003c\/li\u003e\n\u003cli\u003ePlastic Box: PP material\u003c\/li\u003e\n\u003cli\u003eLining: imported high pressure white EVA material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697369940197,"sku":"OL-L-EXTREME-1","price":334.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697369972965,"sku":"OL-L-EXTREME-2","price":432.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon Z mirroless mount","offer_id":48076800622821,"sku":"OL-L-EXTREME-NK-Z","price":363.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-R","offer_id":48076800655589,"sku":"OL-L-EXTREME-EOS-R","price":363.0,"currency_code":"CAD","in_stock":true},{"title":"Sony-FF","offer_id":48076800688357,"sku":"OL-L-EXTREME-S-FF","price":363.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-l-extreme-dual-band-filter-astronomy-plus-1.webp?v=1690487119"},{"product_id":"celestron-h-alpha-h-beta-oiii-imaging-filter-rasa-8-93619","title":"Celestron H-alpha H-beta OIII imaging filter, RASA 8 (93619)","description":"\u003ch2\u003eCelestron H-alpha H-beta OIII imaging filter, RASA 8\u003c\/h2\u003e\n\u003cp\u003eBring out the best in your nebulae astroimages with the H-alpha H-beta OIII (Hα-Hβ-OIII) Imaging Filter for the 8” RASA. This specialized filter allows high transmission of light from emission nebulae while blocking light pollution, helping to make your images pop with detail off the black sky background with superior contrast. Fortunately, many sources of light pollution have relatively discreet emission spectra; they emit primarily at specific wavelengths of light. By strategically blocking these “bad” wavelengths, the filter essentially eliminates the effect of light pollution while letting the “good” wavelengths of light associated with the emission nebula pass through to the camera. You’ll notice much higher contrast in your images immediately, even if imaging from your light polluted backyard! And since the transmission at the key wavelengths is so high, the nebula will not be dimmed—only the background will be blacker.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNebula Hunting\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Hα-Hβ-OIII Imaging Filter for the 8” RASA is perfect for imaging emission nebulae like the North America Nebula (NGC 7000), Lagoon Nebula (M8), Orion Nebula (M42), and the Carina Nebula (NGC 3372). The imaging filter transmits key Hα-Hβ-OIII wavelengths that produce high contrast for emission nebulae. The transmission spectrum for the Hα-Hβ-OIII Imaging Filter is 85% or greater at key wavelengths (486nm, 496nm\/501nm, 656nm) and less than 0.5% transmission elsewhere. The Hα-Hβ-OIII Imaging Filter for the 8” RASA is a narrowband filter that blocks much of the visible spectrum and only lets specific wavelengths through. Because of this, it will not work well on broadband emission objects, such as galaxies and star clusters. \u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/93619_H_-H_-OIII_Imaging_Filter_RASA_8_04_480x480.jpg?v=1618006550\"\u003e\u003c\/p\u003e\n\u003cp\u003eOther similar imaging filters on the market have much narrower bandpasses at the critical Hα-Hβ-OIII wavelengths, but these filters will actually block much of the incoming Hα-Hβ-OIII light for an F\/2 optical system. This is because the light is coming into the filter at a steeper angle, which causes a spectral shift. Using filters not designed specifically for use at F\/2 will cause some of the light from the nebula to be blocked, resulting in a dimmer image. The Celestron Hα-Hβ-OIII Imaging Filter for the RASA 8 was custom engineered to work at F\/2, so none of the “good” light from the nebula is inadvertently blocked by the filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBody and Storage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter is machined aluminum black anodized cell with knurled rim for easy grip during installation.  An anti-reflection coating has been added to the filter to help suppress reflections on the glass. The filter fits directly into the internal filter mount in the RASA 8’s front lens cell, where the optical window normally mounts. By removing the clear window and replacing it with the filter, optical performance for the entire system is maintained. No other adapter is needed. Each filter comes with a foam-lined plastic storage case and retaining ring to safely store the filter or the placeholder optical window glass that came with your RASA when not in use. You will also receive a spectral transmission graph unique to your specific unit, verifying its performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEnhance imaging of nebulae with your 8” Rowe-Ackermann Schmidt Astrograph (RASA) by blocking light pollution, improving image contrast, and darkening the sky background.\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eThis filter transmits only the key Hα-Hβ-OIII wavelengths from emission nebulae, providing high contrast that makes them “pop.”\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eThis filter selectively blocks wavelengths of light from sources of light polluted skies and natural sky glow.\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eUnlike similar filters with narrower bandpasses, this filter was engineered specifically to work with RASA’s fast F\/2 optics.\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits into the 8” RASA’s integrated filter mount, maintaining peak optical performance.\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eOptically flat surfaces free of defects, constructed of Schott glass with anti-reflection coatings.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\" style=\"box-sizing: inherit; border-collapse: collapse; border-spacing: 0px; text-align: left; width: 1200px; color: #333e48; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody id=\"spec-block-1\" style=\"box-sizing: inherit;\"\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eGlass type:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eSchott B270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eGlass thickness:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e2mm (0.078\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eFilter diameter:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e46mm (1.81\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eClear aperture:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e43mm (1.69\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eCoatings:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eDichroic multi-bandpass and multi-layer anti-reflection coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 0px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eFilter cell:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eAluminum, black anodized, knurled rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCelestron H-alpha H-beta OIII imaging filter, RASA 8\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2-Year Warranty\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":43125836841189,"sku":"CEL-93619","price":461.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/celestron-h-alpha-h-beta-oiii-imaging-filter-rasa-8-93619-astronomy-plus-1.webp?v=1690487227"},{"product_id":"optolong-uhc-light-pollution-filter","title":"Optolong UHC Light Pollution Filter","description":"\u003ch2\u003eOptolong UHC Light Pollution Filter\u003c\/h2\u003e\n\u003cp\u003eThe UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.\u003c\/p\u003e\n\u003cp\u003eMain Use and Performance\u003c\/p\u003e\n\u003cp\u003eSuitable for color CCD cameras and unmodified DSLRs.\u003c\/p\u003e\n\u003cp\u003eUHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.\u003c\/p\u003e\n\u003cp\u003eUHC has a substantial red passband and offer superb views for objects like the Orion Nebula (M42).\u003c\/p\u003e\n\u003cp\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation.\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e\u003cstrong\u003eDO NOT LOOK AT THE SUN WITH OPTOLONG FILTER\u003c\/strong\u003e\u003c\/em\u003e. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSubstrate: optical glass\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTave\u0026gt;95%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking range: 300-700nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlcoking depth: OD3, light pollution line blocking \u0026gt;99%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSurface quality: 60\/40 (Refer to MIL-O-13830A, MIL-C-48497A)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted Wavefront RMS:  ¼ λ\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eFilter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Year Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\" Mounted","offer_id":43697824891109,"sku":"OL-UHC-1.25","price":77.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":43697824923877,"sku":"OL-UHC-2","price":119.0,"currency_code":"CAD","in_stock":true},{"title":"M77 Mounted","offer_id":43697824956645,"sku":"OL-UHC-77","price":265.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS-C Clip","offer_id":43697824989413,"sku":"OL-UHC-EOS-C","price":133.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS FF Clip","offer_id":43697825022181,"sku":"OL-UHC-EOS-FF","price":161.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon FF Clip","offer_id":43697825054949,"sku":"OL-UHC-NK-FF","price":161.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-uhc-light-pollution-filter-astronomy-plus_fbccad76-0732-4a71-aef7-04134f1b4a9c.jpg?v=1690487282"},{"product_id":"optolong-clear-sky-filter-screw-on-lens","title":"Optolong Clear Sky Filter Screw on Lens","description":"\u003ch2\u003eOptolong Clear Sky Filter Screw on Lens\u003c\/h2\u003e\n1. Optolong Clear Sky Filter Introduction\n\u003cul\u003e\n \t\u003cli\u003eA screw on filter with the easiest installation way like UV filter.\u003c\/li\u003e\n \t\u003cli\u003eSupress light pollution to make the night sky clearly.\u003c\/li\u003e\n \t\u003cli\u003eEnhance the contrast of images.\u003c\/li\u003e\n \t\u003cli\u003eTo bring up the colors, fascinating experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n2. Coating Technology\n\n·Multi-layers anti-reflection coating\n\n·Non-cementing optical substrate coating\n\n·Optolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\n\n·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.","brand":"Optolong","offers":[{"title":"M77 Mounted","offer_id":43693196771557,"sku":"OL-CS-M77","price":231.0,"currency_code":"CAD","in_stock":true},{"title":"M82 Mounted","offer_id":43693196804325,"sku":"OL-CS-M82","price":287.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon Z Full Frame ILDC Clip-in","offer_id":48076575473893,"sku":"OL-CS-NK-Z","price":231.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-clear-sky-filter-screw-on-lens-astronomy-plus_278f5746-b4a1-42e0-93cd-cbb2d42c993f.png?v=1690487282"},{"product_id":"optolong-sii-6-5nm-imaging-narrowband-filter","title":"Optolong SII 6.5nm Imaging Narrowband Filter","description":"\u003ch2\u003eOptolong SII 6.5nm Imaging Narrowband Filter\u003c\/h2\u003e\n\u003cp\u003eOptolongimproved narrowband SII6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both highand low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain use and performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for viewing on faint emission nebula of H-Alpha line in full moonlight or in severe light pollution.\u003c\/p\u003e\n\u003cp\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula).\u003c\/p\u003e\n\u003cp\u003eNarrowband imaging with SHO kit (H-alpha7nm, OIII 6.5nm and SII6.5nm) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks.\u003c\/p\u003e\n\u003cp\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20210703\/3427717cb1f3057669a8ab02ddfd6cd6.png\" width=\"545\" height=\"317\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e▲ The SII6.5nm filter line is shown in\u003cstrong\u003e\u003cspan style=\"color: #0d5bc9;\"\u003e BLUE.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" width=\"597\" height=\"98\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn The Box\u003c\/h3\u003e\n\u003cp\u003eFilter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697810374885,"sku":"OL-SII-125","price":222.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697810440421,"sku":"OL-SII-2","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":43697810505957,"sku":"OL-SII-31","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":43697810571493,"sku":"OL-SII-36","price":264.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-sii-6-5nm-imaging-narrowband-filter-astronomy-plus_7b34aae6-cbca-42bc-af0d-24dbf0fe8090.png?v=1690487282"},{"product_id":"optolong-cls-ccdcity-light-suppression-broadband-filter","title":"Optolong CLS-CCD(City Light Suppression) Broadband Filter","description":"\u003ch2\u003eOptolong CLS CCD (City Light Suppression) Broadband Filter\u003c\/h2\u003e\n\u003cp\u003eThe CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic purpose at sub-rural area.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for color CCD cameras and unmodified DSLRs.\u003c\/p\u003e\n\u003cp\u003eCLS with wider pass-band than UHC and hence is more favored when observing under mild to moderate light pollution.\u003c\/p\u003e\n\u003cp\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications  \u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSbustrate: Optical glass\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 1.85mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTave:  T\u0026gt;90%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking range: 400-700nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlcoking depth: light pollution  line blocking \u0026gt;99%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSurface quality: 60\/40\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted Wavefront RMS: λ\/4\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan mce-data-marked=\"1\"\u003eFilter\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43693204865253,"sku":"OL-CLS-CCD-1.25","price":133.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43693204898021,"sku":"OL-CLS-CCD-2","price":223.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-C","offer_id":46339850535141,"sku":"OL-CLS-CCD-EOSC","price":161.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-cls-ccd-city-light-suppression-broadband-filter-astronomy-plus_a104e94a-31bc-4ec0-99c9-86af2f3d231a.png?v=1690487285"},{"product_id":"optolong-moon-skyglow-filter","title":"Optolong Moon \u0026 Skyglow Filter","description":"\u003ch2\u003eOptolong Moon \u0026amp; Skyglow Filter\u003c\/h2\u003e\n\u003cp\u003eOptolong Moon \u0026amp; Skyglow filter is designed to darken the background sky by blocking light transmission from skyglow 589nm and many street light emissions from artificial light. Its high efficiency preserves image brightness, reveals more details and increases contrast of moon, galaxies, nebulae and globular star clusters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIdeally it is quite versatile filter for visual observation and astrophotography on planetary nebula.\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSubstrate: B270\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 1.85mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTave:  T\u0026gt;90%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking range: 350-1050nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking depth: light pollution  line blocking \u0026gt;99%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSurface quality: 60\/40\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted Wavefront RMS: λ\/4\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eFilter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697646797029,"sku":"OL-MS-125","price":44.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697646829797,"sku":"OL-MS-2","price":67.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-moon-and-skyglow-filter-astronomy-plus_12f07d3e-7f96-47c6-b542-daadc6113c09.png?v=1690487285"},{"product_id":"optolong-improved-oiii-6-5nm-narrowband-filter","title":"Optolong Improved OIII 6.5nm Narrowband Filter","description":"\u003ch2\u003eOptolong Improved OIII 6.5nm Narrowband Filter\u003c\/h2\u003e\n\u003cp\u003eOptolong improved extra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\n\u003cp\u003eOIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain use and performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for viewing on faint emission nebula of H-Alpha line in full moonlight or in severe light pollution.\u003c\/p\u003e\n\u003cp\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula).\u003c\/p\u003e\n\u003cp\u003eNarrowband imaging with SHO kit (H-alpha7nm, OIII 6.5nm and SII6.5nm) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks.\u003c\/p\u003e\n\u003cp\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/files\/Optolong_O-III_CCD_6.5NM_large.jpg?v=1526319792\" alt=\"Optolong LRGB HA SII \u0026amp; OIII Telescope Filter Kit-OIII Graph\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e▲The GREEN line shows the transmission of the OIII6.5nm filter. \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" width=\"767\" height=\"126\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697194467557,"sku":"OL-OIII-125","price":222.0,"currency_code":"CAD","in_stock":false},{"title":"2\"","offer_id":43697194500325,"sku":"OL-OIII-2","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":43697194533093,"sku":"OL-OIII-31","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":43697194565861,"sku":"OL-OIII-36","price":264.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-improved-oiii-6-5nm-narrowband-filter-astronomy-plus_0958913b-c5db-44b9-bb0d-8886012e3b10.png?v=1690487285"},{"product_id":"optolong-h-alpha-7nm-narrowband-filter","title":"Optolong H-Alpha 7nm Narrowband Filter","description":"\u003ch2\u003eOptolong H-Alpha 7nm Narrowband Filter\u003c\/h2\u003e\n\u003cp\u003eOptolong improved version of H-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain use and performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for viewing on faint emission nebula of H-Alpha line in full moonlight or in severe light pollution.\u003c\/p\u003e\n\u003cp\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula).\u003c\/p\u003e\n\u003cp\u003eNarrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks.\u003c\/p\u003e\n\u003cp\u003eH-alpha filter is the first narrowband addition to LRGB set for most imagers who blend a black-and-white Ha image into RGB data to enhance structural detail while maintaining natural look.\u003c\/p\u003e\n\u003cp\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20210703\/3427717cb1f3057669a8ab02ddfd6cd6.png\" alt=\"\" style=\"float: none;\" width=\"669\" height=\"389\"\u003e\u003c\/div\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: #ff2a00;\"\u003e※This curve is only for reference, and is not used as the final product data.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" width=\"591\" height=\"97\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43693214466277,"sku":"OL-HA-125","price":222.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43693214499045,"sku":"OL-HA-2","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"31mm unmounted","offer_id":43693214531813,"sku":"OL-HA-31","price":236.0,"currency_code":"CAD","in_stock":true},{"title":"36mm unmounted","offer_id":43693214564581,"sku":"OL-HA-36","price":264.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-C","offer_id":46339847127269,"sku":null,"price":307.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-h-alpha-7nm-narrowband-filter-astronomy-plus_749d0928-f62b-49e9-8873-ff8ec9959bd2.png?v=1690487285"},{"product_id":"optolong-improved-nb-filters-sho-6-5nm-narrowband-filter-kit","title":"Optolong Improved NB Filters SHO 6.5nm Narrowband Filter Kit","description":"\u003ch2\u003eOptolong NB Filters SHO 6.5nm Narrowband Filter Kit\u003c\/h2\u003e\n\u003cp\u003eOptolong SHO6.5nm filter kit includes SII6.5nm, H-Alpha7nm, and OIII6.5nm narrow-band filters, generally working with astronomical monochrome cooling CCD and modified DSLR  imaging in each single-channel . Corresponding with RGB channel (Ha, OIII, SII), photographers can process Hubble images by astronomical post processing software .\u003c\/p\u003e\n\u003cp\u003eExtra narrowband SIICCD 6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 12nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)\u003c\/p\u003e\n\u003cp\u003eH-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.\u003c\/p\u003e\n\u003cp\u003eExtra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\n\u003cp\u003eOIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eGive you higher contrast and greater detailed viewing;\u003c\/p\u003e\n\u003cp\u003eDecrease background noise and improve the contrast of objects;\u003c\/p\u003e\n\u003cp\u003eIncrease the faint nebula signal and make it to be brightness;\u003c\/p\u003e\n\u003cp\u003eWith narrow band filters kit, you are able to process a hubble image;\u003c\/p\u003e\n\u003cp\u003eThrough the optimization of the substrate and upgrading of coating technology, significantly improved the halo around the stars, especially in O3.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20191119\/37274b18916a7e7d6fc4f9a0a201f11b.jpg\" width=\"485\" height=\"282\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" width=\"609\" height=\"100\"\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eOIII \/ H-A \/ SII Filters\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697078304997,"sku":"OL-SHO-1.25","price":665.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697078337765,"sku":"OL-SHO-2","price":937.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":43697078370533,"sku":"OL-SHO-31","price":685.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":43697078403301,"sku":"OL-SHO-36","price":768.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-improved-nb-filters-sho-6-5nm-narrowband-filter-kit-astronomy-plus_ec64c790-0e6e-43af-b2ba-0ce0fdbd3a41.png?v=1690487285"},{"product_id":"optolong-uv-ir-cut","title":"Optolong UV\/IR CUT filter","description":"\u003ch2\u003eOptolong UV\/IR CUT\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOptolong UV\/IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most of the optics are designed for the visible spectrum, because it’s very difficult to create a lens with the same focal point for the visible and IR spectrum.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eIt is used on a digital camera and the video, which do not have an IR protection filter toward an image sensor or were remodeled. This is important because unfiltered CCD and CMOS sensors are extremely susceptible to UV and IR rays just outside the visible spectrum that can have a very negative impact on image quality.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuitable for color CMOS and CCD cameras and modified DSLRs.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eUse with monochrome CCD for astrophotography.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAvailable to assist in focusing.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAct as an outstanding dust shield, which prevents the possibility of dust settling on the lens during long time exposure.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20210621\/ae00cf1d3abbdeca0160763948615996.png\" width=\"540\" height=\"349\"\u003e\u003c\/p\u003e\n\u003cp\u003eHow to read the chart?\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e▲The RED line shows the transmission of the UV\/IR Cut filter.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" alt=\"\" width=\"609\" height=\"100\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn The Box\u003c\/h3\u003e\n\u003cp\u003eFilter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697833312485,"sku":"OL-UVIR-1.25","price":61.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697833345253,"sku":"OL-UVIR-2","price":90.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":43697833378021,"sku":"OL-UVIR-31","price":63.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":43697833410789,"sku":"OL-UVIR-36","price":77.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-uvir-cut-astronomy-plus_cd36ff27-e51a-4277-a88a-b6d5f6831f99.png?v=1690487288"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/collections\/imaging-filters-astronomy-plus.jpg?v=1677340906","url":"https:\/\/astronomyplus.com\/collections\/imaging-filters.oembed?page=5","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}