{"product_id":"touptek-lrgb-filters","title":"Touptek LRGB Filters for Astrophotography","description":"\u003ch1\u003eTouptek LRGB Filters for Astrophotography\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 600; color: #3860ea;\"\u003eDesigned to overcome light pollution,\u003c\/span\u003e the ToupTek Astro LRGB filter set empowers astrophotographers to reveal the universe's authentic chromatic splendor.\u003cbr\u003e\u003cbr\u003eThe RGB three-channel filters are essential tools for monochrome astronomy cameras to capture professional-grade images.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #3860ea; font-weight: 600;\"\u003eToupTek Astro LRGB filters\u003c\/span\u003e utilize advanced optical materials and precise coating technology to selectively transmit celestial emissions while blocking urban light pollution. This brings the true colors of the starry sky vividly to life and significantly enhances image contrast.\u003cbr\u003e\u003cbr\u003eEven faint celestial targets can reveal rich details. The extremely low halo effect ensures each image has excellent fidelity, elevating your astrophotography to the next level.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Filters-LRGB-01_1024x1024.webp?v=1772821634\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch4\u003eSpectrum\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Filters-LRGB-03_1024x1024.webp?v=1772821793\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-weight: 600; color: #3860ea; margin-bottom: 8px;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-weight: 600; color: #3860ea; margin-bottom: 8px;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-weight: 600; color: #3860ea; margin-bottom: 8px;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-weight: 600; color: #3860ea; margin-bottom: 8px;\"\u003eSpectral Chart Reading Tips:\u003c\/div\u003e\n\u003cul style=\"margin: 0 0 12px 24px; padding: 0; list-style: disc;\"\u003e\n\u003cli\u003eThe horizontal axis represents the wavelength of light (\u003cb\u003eunit: nm\u003c\/b\u003e), and the vertical axis represents light transmittance (\u003cb\u003eunit: %\u003c\/b\u003e).\u003cbr\u003e\u003cspan style=\"color: #888;\"\u003eGray line: L channel; \u003cspan style=\"color: #e04156;\"\u003eRed: R\u003c\/span\u003e; \u003cspan style=\"color: #27c18a;\"\u003eGreen: G\u003c\/span\u003e; \u003cspan style=\"color: #1cb5e0;\"\u003eBlue: B\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe emission nebula signal bands are mainly concentrated around \u003cb\u003e656nm (Hα)\u003c\/b\u003e, \u003cb\u003e500.7nm (OIII)\u003c\/b\u003e, and other bands.\u003c\/li\u003e\n\u003cli\u003eLight pollution peaks are commonly found near \u003cb\u003e540nm\u003c\/b\u003e and \u003cb\u003e590nm\u003c\/b\u003e (sodium\/mercury lamp bands).\u003c\/li\u003e\n\u003cli\u003eThe transmission regions of the astronomical filters are engineered to avoid these interference bands, ensuring effective signal passage, enhancing contrast, and image purity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAccurate Wavelength Bands, Restoring True Colors\u003c\/h4\u003e\n\u003cp\u003eHigh-precision wavelength positioning, RGB reproduction closer to the human eye for more realistic target colors.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"font-weight: 600; color: #3860ea;\"\u003eL Filter (420–690nm):\u003c\/span\u003e UV\/IR cutoff for enhanced contrast and sharpness.\u003cbr\u003e\u003cspan style=\"font-weight: 600; color: #e04156;\"\u003eR Filter (595–695nm):\u003c\/span\u003e Highlighting the Hα and SII bands.\u003cbr\u003e\u003cspan style=\"font-weight: 600; color: #27c18a;\"\u003eG Filter (495–580nm):\u003c\/span\u003e Suppresses mercury\/sodium pollution while transmitting OIII.\u003cbr\u003e\u003cspan style=\"font-weight: 600; color: #1cb5e0;\"\u003eB Filter (400–510nm):\u003c\/span\u003e Captures Hβ and OIII emissions.\u003c\/p\u003e\n\u003ch4\u003eHigh-Quality Quartz Glass, High Transparency and Purity\u003c\/h4\u003e\n\u003cp\u003eToupTek filters feature high-purity quartz glass substrates with \u0026gt;90% transmittance. They deliver exceptional blue-violet transmission and thermal stability, ideal for demanding astronomical imaging.\u003c\/p\u003e\n\u003ch4\u003eIAD Dense Coating, Durable and Stable\u003c\/h4\u003e\n\u003cp\u003eUsing IAD (Ion Assisted Deposition) coating technology, which is more costly than conventional vacuum evaporation but produces denser and more uniform coatings that are durable, corrosion-resistant, and have superior environmental stability.\u003c\/p\u003e\n\u003ch4\u003ePrecision Coating, Significantly Suppresses Halos\u003c\/h4\u003e\n\u003cp\u003eToupTek filters use a proprietary multi-layer coating system—including single-sided cutoff, front AR coating, and edge blackening—to eliminate halos, minimize stray light, and ensure long-term durability.\u003c\/p\u003e\n\u003ch4\u003eHigh Optical Cutoff Depth, Restores Natural Colors\u003c\/h4\u003e\n\u003cp\u003eAll filters feature OD≥5.0 cutoff depth, blocking unwanted light to eliminate artifacts and deliver true-to-life color reproduction.\u003c\/p\u003e\n\u003ch4\u003eMatte Black Edge Coating, Easy Installation\u003c\/h4\u003e\n\u003cp\u003eAll filters feature matte black edge treatment to eliminate stray light, ensuring optimal transmittance and contrast.\u003cbr\u003e\u003cspan style=\"text-decoration: underline;\"\u003e36mm filters:\u003c\/span\u003e Telescope-facing side has inward blackened border for instant orientation recognition.\u003cbr\u003e\u003cspan style=\"text-decoration: underline;\"\u003e1.25\" \u0026amp; 2\" filters:\u003c\/span\u003e Feature threaded aluminum alloy frames for direct screw-in installation.\u003c\/p\u003e\n\u003ch4\u003eHighly Compatible\u003c\/h4\u003e\n\u003cp\u003eAll filters use a single-piece, glue-free structure.\u003cbr\u003e▲ 36mm: APS-C \u0026amp; smaller sensors\u003cbr\u003e▲ 1.25\": 1-inch \u0026amp; smaller sensors\u003cbr\u003e▲ 2\": Full-frame \u0026amp; smaller sensors\u003c\/p\u003e\n\u003ch4\u003eCompatible with industry-standard filter wheels:\u003c\/h4\u003e\n\u003cp\u003e36mm: 7-hole \/ 1.25\": 8-hole \/ 2\": 5-hole\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003e36mm (unframed) \/ 1.25” (31.77mm) \/ 2”\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Thickness\u003c\/td\u003e\n\u003ctd\u003e2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL\u003c\/td\u003e\n\u003ctd\u003e420–690nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eR\u003c\/td\u003e\n\u003ctd\u003e595–695nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eG\u003c\/td\u003e\n\u003ctd\u003e495–580nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB\u003c\/td\u003e\n\u003ctd\u003e400–510nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmittance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;95%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Material\u003c\/td\u003e\n\u003ctd\u003eQuartz glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame Material\u003c\/td\u003e\n\u003ctd\u003eAluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eDouble-sided high-precision optical polishing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating Technology\u003c\/td\u003e\n\u003ctd\u003eIAD (Ion Assisted Deposition) coating technology\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating System Design\u003c\/td\u003e\n\u003ctd\u003eAR anti-reflection coating + quartz glass + precision cutoff coating layer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOD\u003c\/td\u003e\n\u003ctd\u003e≥5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eLRGB Filters at selected size :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1.25''\u003c\/li\u003e\n\u003cli\u003e36mm\u003c\/li\u003e\n\u003cli\u003e2''\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n\u003cspan\u003eWarranty \u0026amp; Manual\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.touptek-astro.com\/sales_policy\/\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong data-start=\"615\" data-end=\"650\"\u003eToupTek 2 year Warranty \u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Touptek","offers":[{"title":"1.25'' Set","offer_id":48506898514149,"sku":"TOU-LRGB-125","price":181.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Set","offer_id":48506898546917,"sku":"TOU-LRGB-36","price":251.0,"currency_code":"CAD","in_stock":true},{"title":"2'' Set","offer_id":48506898579685,"sku":"TOU-LRGB-2","price":335.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/LRGB_36mm_filter.webp?v=1772822290","url":"https:\/\/astronomyplus.com\/products\/touptek-lrgb-filters","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}