{"product_id":"baader-filtro-o-iii-narrowband-6-5nm","title":"Baader O-III Narrowband Filter 6.5nm","description":"\u003cp\u003e\u003cstrong\u003eThe Baader O-III Narrowband Filter 6.5nm\u003c\/strong\u003e is a narrowband filter that passes blue-green light at 500.7nm, the wavelength at which planetary nebulae and supernova remnants rich in doubly ionized oxygen shine. Optimized for modern CMOS cameras.\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eLinear filter with a 6.5nm FWHM passband, recommended for optical systems from f\/10 to f\/3.5 — the vast majority of amateur telescopes in use. It reveals the details of planetary nebulae and supernova remnants even under light-polluted skies, since the narrow passband effectively blocks skyglow and artificial lighting.\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\u003eO-III Narrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelength\u003c\/td\u003e\n\u003ctd\u003e500.7 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 planetary nebulae and supernova remnants in O-III without needing H-alpha or S-II. Compatible with filter wheels and most mono CMOS cameras.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":58478665105739,"sku":"BRBP2961175","price":146.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58478666481995,"sku":"BRBP2961178","price":247.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58478666514763,"sku":"BRBP2961176","price":154.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58478666547531,"sku":"BRBP2961177","price":176.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58478666580299,"sku":"BRBP2961179","price":296.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58478666613067,"sku":"BRBP2961180","price":306.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58478666645835,"sku":"BRBP2961181","price":382.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-filtro-o-iii-narrowband-65nm-114pollice.jpg?v=1789477238","url":"https:\/\/adriasky.it\/en\/products\/baader-o-iii-narrowband-filter-6-5nm","provider":"Adriasky","version":"1.0","type":"link"}