{"product_id":"baader-filtro-h-alpha-narrowband-6-5nm","title":"Baader H-alpha Narrowband Filter 6.5nm","description":"\u003cp\u003e\u003cstrong\u003eThe Baader H-alpha Narrowband Filter 6.5nm\u003c\/strong\u003e is the CMOS-optimized narrowband filter for high-contrast imaging of emission nebulae, isolating the H-alpha line at 656.3nm.\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eThe H-alpha filter passes light at 656nm, the best choice for high-contrast narrowband astrophotography, capable of revealing the richest nebula details even in areas with strong light pollution. With a 6.5nm FWHM passband, it's optimized for optical systems from f\/10 to f\/3.5 — the vast majority of amateur telescopes in use.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eThe filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. The filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eH-alpha Narrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelength\u003c\/td\u003e\n\u003ctd\u003e656.3 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e6.5 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/10 to f\/3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho it's for\u003c\/h2\u003e\n\u003cp\u003eIdeal for astrophotographers who want to purchase the individual filters of the SHO palette separately (for example to complete or replace an existing set), or for those who photograph exclusively H-alpha emission nebulae without needing O-III or S-II. Compatible with filter wheels and most mono CMOS cameras for astrophotography.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":58478508245323,"sku":"BRBP2961100","price":149.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58478523941195,"sku":"BRBP2961103","price":253.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58478523973963,"sku":"BRBP2961101","price":156.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58478524006731,"sku":"BRBP2961102","price":177.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58478524039499,"sku":"BRBP2961104","price":263.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58478524072267,"sku":"BRBP2961105","price":301.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58478524105035,"sku":"BRBP2961106","price":387.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-filtro-h-alpha-narrowband-65nm-114pollice.jpg?v=1789476867","url":"https:\/\/adriasky.it\/en\/products\/baader-h-alpha-narrowband-filter-6-5nm","provider":"Adriasky","version":"1.0","type":"link"}