{"product_id":"alpine-astronomical-baader-889nm-methane-ccd-filter-1-25","title":"ALPINE ASTRONOMICAL Baader 889nm Methane CCD Filter (1.25\")","description":"\u003cul\u003e \u003cli\u003ePure 889nm Methane Bandpass\u003c\/li\u003e \u003cli\u003eSchott RG 830 Optical Glass\u003c\/li\u003e \u003cli\u003eSuper Stack Dielectric Multi-Coatings\u003c\/li\u003e \u003cli\u003eStandard 1.25\" Eyepiece Filter Housing\u003c\/li\u003e \u003c\/ul\u003e\u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cp\u003e The 1.25\" \u003cb\u003eAlpine Astronomical Baader Methane Filter\u003c\/b\u003e passes the near-infrared methane wavelength centered at 889nm with a narrow 8nm bandpass. It is excellent for imaging gas giants such as Jupiter, Saturn, and Neptune. \u003c\/p\u003e \u003cp\u003eUsing the filter causes features of planets that are dominated by methane to have greater contrast and it makes it easier to image changes. A planeoptically polished Schott RG 830 optical glass substrate and dielectric multi-coatings ensure the precision of the bandpass for optimal image quality. Imaging through the filter will require longer exposure times than normal due to the darkening caused by the band absorption, and since the human eye cannot see wavelengths above 700nm this filter will not add anything to visual observations. Alpine recommends the use of an IR-sensitive CCD camera or webcam and at least a 5\" aperture telescope�with 8\" recommended. The filter is mounted in a standard 1.25\" eyepiece filter housing.\u003c\/p\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e\u003cdiv\u003e \u003cdiv\u003e In the Box \u003c\/div\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cdiv\u003e Alpine Astronomical Baader Methane Imaging Filter (1.25\") \u003c\/div\u003e \u003c\/div\u003e \u003cli\u003ePlastic Case\u003c\/li\u003e \u003cli\u003eLimited 2-Year Warranty\u003c\/li\u003e \u003c\/div\u003e \u003c\/div\u003e\u003cbr\u003eAll product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.","brand":"Alpine Astronomical-10","offers":[{"title":"Default Title","offer_id":814456078352,"sku":"ALFMTH1:ALFMTH1:bhpv","price":50945.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/1611\/products\/alpine_astronomical_fmth_1_baader_889nm_methane_ccd_1528320945000_1405361.jpg?v=1576005634","url":"https:\/\/www.tanotis.com\/products\/alpine-astronomical-baader-889nm-methane-ccd-filter-1-25","provider":"Tanotis","version":"1.0","type":"link"}