{"product_id":"optolong-set-filtri-sho-3nm-36mm-h-alpha-oiii-sii","title":"Optolong SHO Filter Set 3nm 36mm (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Optolong SHO Filter Set 3nm 36mm (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e is the unmounted version of the extra-narrowband Optolong SHO range, designed for the maximum possible contrast with cooled monochrome CCD cameras and modified DSLRs, in a format compatible with the most common filter wheels.\u003c\/p\u003e\n\n\u003ch2\u003eThree filters, extra-narrow bandwidth\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter (656nm, 3nm bandwidth), an \u003cstrong\u003eO-III\u003c\/strong\u003e filter (500nm, 3nm bandwidth) and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter (672nm, 3nm bandwidth), all in unmounted 36mm format. Corresponding to the R-G-B channels (H-alpha, O-III, S-II), they allow processing of images in \"Hubble\" style with astronomical post-processing software. Compared to the 6.5\/7nm version, the narrower bandwidth provides greater contrast, reduces background noise, and increases the visibility of faint nebula signals.\u003c\/p\u003e\n\n\u003ch2\u003eConstruction and coatings\u003c\/h2\u003e\n\u003cp\u003eThe filters are made with high-quality optical substrate and multi-layer coating using ion-assisted deposition (IAD) technology, which ensures scratch resistance and central wavelength stability even with temperature changes.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth\u003eParameter\u003c\/th\u003e\u003cth\u003eValue\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eFilters included\u003c\/td\u003e\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBandwidth\u003c\/td\u003e\u003ctd\u003e3 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFormat\u003c\/td\u003e\u003ctd\u003e36mm unmounted\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBrand\u003c\/td\u003e\u003ctd\u003eOptolong\u003c\/td\u003e\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 with 36mm filter wheels (such as ZWO EFW) using cooled monochrome CCD cameras or modified DSLRs who want the maximum contrast available for false-color images in the \"Hubble Palette\" style of emission nebulae, planetary nebulae, and supernova remnants.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":57948225995083,"sku":"OPSHO-3-36","price":859.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/36-mm-sho-filter-set-optolong.jpg?v=1785088037","url":"https:\/\/adriasky.it\/en\/products\/optolong-sho-filter-set-3nm-36mm-h-alpha-oiii-sii","provider":"Adriasky","version":"1.0","type":"link"}