{"product_id":"player-one-ch4-8nm-1-25-methane-band-filter","title":"Player One CH4 8nm 1.25\" Methane Band Filter","description":"\u003cp\u003e\u003cstrong\u003eOverview.\u003c\/strong\u003e The Player One CH4 8nm 1.25\" Methane Band Filter is an E-series bandpass filter centered on the 889nm methane absorption band. It isolates the wavelength at which methane in gas-giant atmospheres absorbs strongly, revealing high-altitude cloud and haze structure on Jupiter, Saturn, Uranus, and Neptune that is invisible in ordinary visible-light imaging. The filter is built on a high-quality optical glass substrate with a multi-layer composite coating and threads into standard 1.25\" mounts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWho It's For.\u003c\/strong\u003e This filter suits advanced planetary imagers using sensitive monochrome cameras who want to capture methane-band detail on the giant planets, and researchers or enthusiasts studying atmospheric banding and storm structure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features \u0026amp; Design.\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e889nm methane band:\u003c\/strong\u003e a center wavelength of 889nm targets the deep methane absorption feature of gas-giant atmospheres.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8nm bandwidth:\u003c\/strong\u003e a narrow 8nm passband isolates the band for maximum atmospheric contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOD4 blocking:\u003c\/strong\u003e deep off-band rejection keeps the recorded signal clean.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh in-band throughput:\u003c\/strong\u003e approximately 90% peak transmittance helps offset the low light levels of methane-band work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 1.25\" format:\u003c\/strong\u003e M28.5×0.6 cell fits common 1.25\" filter wheels, drawers, and nosepieces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOptical\/Mechanical Design.\u003c\/strong\u003e The filter passes an 8nm band centered at 889nm with OD4 off-band blocking and approximately 90% peak transmittance. The surface is figured to 1\/4 lambda and the E-series multi-layer composite coating is applied to a high-quality optical glass substrate 1.85mm thick. The anodized cell uses M28.5×0.6 (1.25\") threads and measures 7.5mm overall (5mm body plus 2.5mm thread).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRecommended Uses.\u003c\/strong\u003e Methane-band imaging of Jupiter, Saturn, Uranus, and Neptune to reveal high-altitude cloud, haze, and storm features; long-exposure lucky-imaging sequences with sensitive monochrome planetary cameras.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCompatibility \u0026amp; Accessory Notes.\u003c\/strong\u003e The M28.5×0.6 cell fits standard 1.25\" filter wheels, drawers, and nosepieces. Because the methane band is a faint, deep-red\/near-infrared feature, the filter is best paired with a sensitive monochrome camera and a telescope of adequate aperture. Long exposures relative to standard RGB planetary work are typical.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGood to Know Before You Order.\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow light levels:\u003c\/strong\u003e methane-band imaging is photon-starved, so longer exposures and larger apertures give the best results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping weight:\u003c\/strong\u003e a packaged weight is not published by the manufacturer; contact us if you need it before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera type:\u003c\/strong\u003e a sensitive monochrome camera is recommended for methane-band capture.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFAQ.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e No. The filter threads into any standard 1.25\" filter wheel, drawer, or nosepiece and needs no adjustment once installed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the methane band show?\u003c\/strong\u003e At 889nm, methane in giant-planet atmospheres absorbs light strongly, so high-altitude clouds and hazes stand out brightly against darker, deeper layers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich planets benefit most?\u003c\/strong\u003e Jupiter, Saturn, Uranus, and Neptune all show distinctive methane-band structure not seen in ordinary visible-light imaging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBottom Line.\u003c\/strong\u003e A narrow 889nm methane-band filter in the convenient 1.25\" format, the Player One CH4 8nm opens up high-contrast atmospheric imaging of the giant planets for dedicated monochrome planetary imagers.\u003c\/p\u003e","brand":"Player One Astronomy","offers":[{"title":"Default Title","offer_id":53834291708015,"sku":"CH4-125E","price":180.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/CH4-E-1024x850.jpg?v=1784239722","url":"https:\/\/ontariotelescope.com\/products\/player-one-ch4-8nm-1-25-methane-band-filter","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}