{"product_id":"astronomik-h-alpha-filter","title":"Astronomik H-alpha 12nm MaxFR XT Clip-Filters - EOS\/Sony\/Nikon","description":"\u003cdiv class=\"product-detail-description-text\"\u003e\n\u003ch2\u003e\u003cspan\u003eAstronomik H-alpha 12nm MaxFR XT Clip-Filter\u003c\/span\u003e\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cspan\u003eThe Astronomik H-alpha filter is ideal for imaging hydrogen nebulae. It works from both light-polluted and dark sites. It enhances contrast between objects at 656nm and the sky background. This h alpha filter blocks sodium and mercury lamp emissions. It also removes natural airglow and most moonlight. Note: this is not a hydrogen alpha solar filter — never use it for solar observation.\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003eWith a bandwidth of 12nm or 6nm, the filter blocks unwanted light. It covers wavelengths from UV to IR, outside 656nm.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"color: #f10e0e;\"\u003e\u003cb\u003eThe Astronomik H-alpha filter MUST NOT BE USED for solar observation!\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eImaging with Astronomik Narrowband-Emissionline filters\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Astronomik H-alpha filter is the best first step in narrowband astrophotography. It lets you shoot deep, contrasty images under heavy light pollution or a full moon. It is ideal for red-glowing nebulae. \u003ca href=\"https:\/\/www.astronomik.com\/en\/Astronomik-OIII-Clip-Filter\/10201093M\" rel=\"noreferrer noopener\" target=\"_self\"\u003eAstronomik OIII filters\u003c\/a\u003e add greenish and blueish structures. \u003ca href=\"https:\/\/www.astronomik.com\/en\/Astronomik-SII-Clip-Filter\/10201096M\" rel=\"noreferrer noopener\" target=\"_self\"\u003eAstronomik SII filter\u003c\/a\u003e completes the HSO palette for false-color imaging.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eDifference between Astronomik H-alpha 12nm and 6nm filters\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.astronomik.com\/media\/23\/97\/f8\/1715863002\/G_HA_12nm_u_6nm.png?1716895368\" alt=\"G_HA_12nm_u_6nm.png?1716895368\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cb\u003e6nm filters\u003c\/b\u003e suit star-crowded regions. They halve the number of stars in the image. They are ideal for very low dark current cameras or extreme light pollution.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cb\u003e12nm filters\u003c\/b\u003e suit typical DSLR and CCD cameras. They also work well with cameras that have integrated guiding sensors.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eDifference between Astronomik MFR and MaxFR coating\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eBoth coatings give excellent UV-to-IR blocking, high contrast, and sharp stars.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cb\u003e12nm MFR-coated filters\u003c\/b\u003e work from f\/3 to f\/∞.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cb\u003e6nm MFR-coated filters\u003c\/b\u003e work from f\/4 to f\/∞.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThe MaxFR coating is designed to work perfectly with fast optical systems. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFor \u003cb\u003e12nm MaxFR filters\u003c\/b\u003e: unlimited use from f\/1.7 to f\/6. About 85% transmission at f\/1.4.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFor \u003cb\u003e6nm MaxFR filters\u003c\/b\u003e: unlimited use from f\/2.2 to f\/6. About 90% transmission at f\/2.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003eFilters for even faster optics are available on request.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDifference between Astronomik standard and XT Clip-Filters\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Astronomik XT-Filters are designed for wide-angle astrophotography. Standard Clip-Filters can stretch stars in image corners. XT-Filters use a 0.3mm or 0.5mm substrate to reduce aberrations. They maintain the same high optical quality and durable coating. More information about our XT-Filters can be found \u003ca href=\"https:\/\/www.astronomik.com\/en\/Clip-Filters\/XT-Clip-Filter\/\"\u003ehere\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eGuaranteed transmission \u0026gt;90% at the H-alpha line (656nm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTypical transmission: 96% (12nm), 93% (6nm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGlass thickness: 1mm (except OWB Type 3 and XT filters)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003eFinely polished optical glass, free of striae, stresses, and bubbles\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003eScratch-resistant and durable coating\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003eResistant to humidity and aging\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003eParfocal with other Astronomik filters\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003eDiffraction-limited\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003eDelivered in a high-quality filter box\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eEvery filter passes rigorous quality control. Each unit is measured with a PerkinElmer Spectrophotometer. Spectral data is printed on each filter box label.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/www.astronomik.com\/media\/23\/97\/f8\/1715863002\/G_HA_12nm_u_6nm.png?1716895368\" alt=\"G_HA_12nm_u_6nm.png?1716895368\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-detail-properties\"\u003e\n\u003cdiv class=\"row product-detail-properties-container\"\u003e\n\u003cdiv class=\"col-md-10 col-lg-6\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelected frame size of Astronomik H-alpha 12nm CCD MaxFR Filter\u003c\/li\u003e\n\u003cli\u003ePlastic Storage Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"tab__content tab.box tab__content--active\" data-content=\"tab-3\" aria-labelledby=\"tab-title-3\" aria-hidden=\"false\" role=\"tabpanel\"\u003e\u003cspan\u003eManual \u0026amp; Warranty\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.astronomik.com\/en\/warranty-garantie.html\"\u003eAstronomik\u003cspan\u003e \u003c\/span\u003e\u003c\/a\u003e10 year warranty\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"EOS APS-C \/ MRF","offer_id":48891750842597,"sku":"AK-8h00kh","price":312.0,"currency_code":"CAD","in_stock":true},{"title":"EOS M \/ MRF","offer_id":48891823784165,"sku":"AK-8h11j0","price":339.0,"currency_code":"CAD","in_stock":true},{"title":"EOS R XL \/ MRF","offer_id":48891750908133,"sku":"AK-8h11u8","price":516.0,"currency_code":"CAD","in_stock":true},{"title":"EOS R XL \/ MaxFR","offer_id":48891823915237,"sku":"AK-8h11u9","price":666.0,"currency_code":"CAD","in_stock":true},{"title":"EOS XL \/ MRF","offer_id":48891750875365,"sku":"AK-8h11uj","price":516.0,"currency_code":"CAD","in_stock":true},{"title":"EOS XL \/ MaxFR","offer_id":48891823948005,"sku":"AK-8h11uk","price":666.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon XL \/ MRF","offer_id":48891750973669,"sku":"AK-8h11um","price":516.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon XL \/ MaxFR","offer_id":48891823980773,"sku":"AK-8h11un","price":666.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon Z XL \/ MRF","offer_id":48891751006437,"sku":"AZ-8h11uc","price":516.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon Z XL \/ MaxFR","offer_id":48891824013541,"sku":"AK-8h11ud","price":666.0,"currency_code":"CAD","in_stock":true},{"title":"Sony alpha 7 \/ MRF","offer_id":48891750940901,"sku":"AK-8h11ua","price":516.0,"currency_code":"CAD","in_stock":true},{"title":"Sony alpha 7 \/ MaxFR","offer_id":48891824111845,"sku":"AK-8h11ub","price":666.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/astronomik_h-alpha-ccd-12nm_eos-clip_800x800_e57b5515-4481-4cfc-87a7-95c13e2b9407.jpg?v=1777042123","url":"https:\/\/astronomyplus.com\/products\/astronomik-h-alpha-filter","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}