{"product_id":"baader-set-filtri-narrowband-6-5nm-sho","title":"Baader Narrowband Filter Set 6.5nm (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Baader Narrowband Filter Set 6.5nm (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e is the professional combination of three precision narrowband filters, CMOS-optimized, designed for tri-colour imaging of emission nebulae according to the famous \"Hubble\" palette (SHO).\u003c\/p\u003e\n\n\u003ch2\u003eThree filters, one palette\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter (656.3nm), an \u003cstrong\u003eO-III\u003c\/strong\u003e filter (500.7nm) and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter (671.7nm), all with a 6.5nm FWHM passband — the optimal bandwidth for optical systems from f\/10 to f\/3.5, the vast majority of amateur telescopes in use. The three bands are calibrated to allow 1:1:1 exposure ratios, matched to the typical quantum efficiency and signal-to-noise ratio of modern CMOS sensors.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eEach 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. Each 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\u003eFilters included\u003c\/td\u003e\n\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelengths\u003c\/td\u003e\n\u003ctd\u003e656.3 \/ 500.7 \/ 671.7 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 create false-colour \"Hubble Palette\" style images of emission nebulae, planetary nebulae and supernova remnants, even under heavy light pollution and with the moon high in the sky. Compatible with filter wheels and most mono CMOS cameras for astrophotography.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":57946506625355,"sku":"BRBP2961650","price":418.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58166939353419,"sku":"BRBP2961653","price":708.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58166939386187,"sku":"BRBP2961651","price":441.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58166939418955,"sku":"BRBP2961652","price":500.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58166939451723,"sku":"BRBP2961654","price":806.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58166939484491,"sku":"BRBP2961655","price":859.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58166939517259,"sku":"BRBP2961656","price":1091.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-set-filtri-narrowband-65nm-114pollice.jpg?v=1787056928","url":"https:\/\/adriasky.it\/en\/products\/baader-narrowband-filter-set-6-5nm-sho","provider":"Adriasky","version":"1.0","type":"link"}