{"product_id":"filtro-idas-nbz-ii-10nm-2-pollici","title":"IDAS NBZ-II Filter 10nm 2\"","description":"\u003ch2\u003eA dual-band filter for narrowband imaging in a single session\u003c\/h2\u003e\u003cp\u003eThe IDAS NBZ-II filter simultaneously transmits the red H-alpha line and the blue-green OIII lines, increasing the contrast of emission nebulae and allowing narrowband images to be obtained with just one series of exposures, without needing to alternate between multiple single-band filters.\u003c\/p\u003e\u003ch3\u003eDesigned to work well even with very fast optics\u003c\/h3\u003e\u003cp\u003eThe filter is compatible with telescopes and photographic lenses down to f\/1.4, making it usable on virtually any standard optic and most fast photographic lenses. The 10nm bandwidth for H-alpha and 8nm for OIII is slightly wider than the 7nm dual-band filters of other manufacturers: this extra margin avoids the severe transmission loss (sometimes over 50%) that occurs with narrower filters when used on very fast optics (around f\/2), making the NBZ-II suitable for both slow and fast systems without needing to change filters.\u003c\/p\u003e\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\u003cth\u003eParameter\u003c\/th\u003e\u003cth\u003eValue\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eH-alpha bandwidth\u003c\/td\u003e\u003ctd\u003e10 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOIII bandwidth\u003c\/td\u003e\u003ctd\u003e8 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilter thickness\u003c\/td\u003e\u003ctd\u003e2.0 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMount\u003c\/td\u003e\u003ctd\u003e2\" ring\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMount material\u003c\/td\u003e\u003ctd\u003eAluminium\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOptical coating\u003c\/td\u003e\u003ctd\u003eMulti-coating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOptics compatibility\u003c\/td\u003e\u003ctd\u003eDown to f\/2 (also usable on slower systems)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eInfrared blocking\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePhotographic use\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eVisual use\u003c\/td\u003e\u003ctd\u003eNo (photographic only)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSuitable for nebulae and galaxies\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSuitable for double stars\u003c\/td\u003e\u003ctd\u003eNo\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSuitable for Moon and planets\u003c\/td\u003e\u003ctd\u003eNo\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSuitable for narrowband astrophotography of planetary nebulae, emission nebulae and supernova remnants with telescopes fitted with a 2\" focuser, particularly for those using fast astrographs who don't want to give up a universal filter that also works on slower systems. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887881331019,"sku":"ID87198","price":362.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/IDAS-Filtro-NBZ-II-O-III-H-alpha-10nm-2.jpg?v=1784290592","url":"https:\/\/adriasky.it\/en\/products\/idas-nbz-ii-filter-10nm-2-inch","provider":"Adriasky","version":"1.0","type":"link"}