{"product_id":"s-series-uv-ir-cut-1-25-filter","title":"S-series UV IR-CUT 1.25\" Filter","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Player One Astronomy S-series UV IR-CUT 1.25″ filter keeps your camera inside the visible band, passing more than 95% of visible light while blocking the ultraviolet and infrared that would otherwise bloat stars and soften planetary and lunar detail. It is a straightforward, high-transmission way to tighten focus and hold true colour in your imaging train.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis filter suits imagers using refractors and other optics that are not corrected across UV and IR, where that stray light spreads the focus. If you shoot the planets, the Moon, or luminance frames with a colour or mono camera and want crisper, true-colour results, it belongs in your kit.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV and IR rejection:\u003c\/strong\u003e confines light to the visible band so stars focus tightly and planetary contrast improves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh visible transmission:\u003c\/strong\u003e ≥95% throughput keeps images bright and colour true.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-layer composite coating:\u003c\/strong\u003e applied to a high-quality optical-glass substrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25″ format:\u003c\/strong\u003e threads into standard 1.25-inch cells, drawers, and filter wheels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple, passive optic:\u003c\/strong\u003e no power or electronics — just thread it in and refocus.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical\/Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAs a UV IR-CUT filter, it passes the visible band at high efficiency (≥95% transmittance) while attenuating out-of-band ultraviolet and infrared to optical density 2 (OD2). Removing those wavelengths matters because most refractors do not bring UV and IR to the same focus as visible light, so leaving them in enlarges star images and lowers planetary contrast; cutting them tightens focus and cleans up colour. The 2 mm-thick optical-glass substrate carries a multi-layer composite coating. Mechanically it is a 1.25-inch threaded filter with a 5 mm body plus 2 mm thread section (7 mm total).\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/UV-IR-CUT-curve__77722.jpg?v=1766558517\" alt=\"Player One Astronomy S-series UV IR-CUT 1.25-inch filter transmission curve showing the visible passband with UV and IR blocking\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePlanetary and lunar imaging with colour or monochrome cameras on refractors.\u003c\/li\u003e\n\u003cli\u003eLuminance capture where UV\/IR bloat would otherwise soften stars.\u003c\/li\u003e\n\u003cli\u003eEveryday visible-band imaging that benefits from tighter focus and true colour.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility \u0026amp; Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e standard 1.25″ filter thread — works in 1.25-inch cells, drawers, and filter wheels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCameras:\u003c\/strong\u003e pairs with one-shot-colour and monochrome astronomy cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackfocus:\u003c\/strong\u003e the 7 mm cell and 2 mm glass add to your optical path; include them in your spacing calculation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eThis is an imaging filter that improves sharpness and colour by removing UV and IR; it is not a light-pollution or narrowband filter.\u003c\/li\u003e\n\u003cli\u003eOut-of-band blocking is specified at OD2, which suits general visible-band imaging; for demanding refractor work at the highest contrast, a deeper-blocking filter may be preferred.\u003c\/li\u003e\n\u003cli\u003ePlayer One does not publish a net weight for this filter, so the shipping weight shown at checkout is an estimate. Contact us if you need an exact figure.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e No. It threads into a standard 1.25-inch cell, drawer, or wheel and needs no power or configuration; refocus once after fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a UV IR-CUT filter do?\u003c\/strong\u003e It limits the light reaching your sensor to the visible band, cutting the ultraviolet and infrared that most refractors do not focus to the same point, which sharpens stars and improves planetary and lunar contrast.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it change my colour balance?\u003c\/strong\u003e It preserves true visible colour by removing only the UV and IR wings; more than 95% of visible light passes through.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it visually?\u003c\/strong\u003e Its main purpose is imaging, where the focus and colour benefits are most visible, though it fits any standard 1.25-inch filter thread.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe S-series UV IR-CUT 1.25″ filter is an affordable, high-transmission way to keep imaging in the visible band, giving you tighter stars and truer colour on planetary, lunar, and luminance work.\u003c\/p\u003e","brand":"Player One Astronomy","offers":[{"title":"Default Title","offer_id":44013646086255,"sku":"POA-UVIR125","price":30.8,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/UV-IR-CUT-en__66417.jpg?v=1766558518","url":"https:\/\/ontariotelescope.com\/products\/s-series-uv-ir-cut-1-25-filter","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}