{"product_id":"alstar-deluxe-telescope-lrgb-1-25-in-filter-set-for-monochrome-ccd","title":"Alstar Deluxe Telescope LRGB 1.25 in Filter Set - For Monochrome CCD","description":"\u003cp\u003eIn this review of the Alstar Deluxe Telescope LRGB 1.25 in Filter Set the bottom line is simple: astrophotographers using a monochrome CCD who want to build high-resolution color images will find this set a practical and affordable way to capture separate luminance and color channels. The reviewer found the four parfocal filters-luminance plus red, green and blue-deliver consistent transmission and easy mechanical handling thanks to precision CNC-machined metal cells, making them a sensible choice for anyone combining long exposures with a filter wheel.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25 in Luminance:\u003c\/strong\u003e Transmits the full visible spectrum and preserves fine detail for high-resolution monochrome luminance frames.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRGB Color Filters:\u003c\/strong\u003e Separate red, green and blue filters capture the primary color channels needed to assemble accurate color images from a monochrome CCD.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDichroic Glass:\u003c\/strong\u003e Designed for maximum transmission so each color channel records strong signal without excessive loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal Design:\u003c\/strong\u003e Filters are parfocal to reduce refocusing between exposures and save time during long imaging sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC-machined Metal Cell:\u003c\/strong\u003e Sand-blasted, black anodized finish with laser engraving and aluminum oxide threads for smooth, secure accessory coupling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlocking Coating:\u003c\/strong\u003e Color filters include blocking coatings to suppress unwanted wavelengths and improve color fidelity in combined images.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis filter set is aimed at amateur and semi-pro astrophotographers who already use or plan to use a monochrome CCD camera and a filter wheel to create high-resolution color images. It is especially useful for those who prioritize control over exposure for each color channel and want parfocal filters to speed workflow.\u003c\/p\u003e\n\u003cp\u003eIt is less suited to users who rely exclusively on one-shot color cameras or who need larger format filters; the set is specific to 1.25 in accessories and is intended to be used with a filter wheel for the best experience.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConsistent high transmission from dichroic glass produces strong signal for each channel.\u003c\/li\u003e\n\u003cli\u003eParfocal filters eliminate frequent refocusing, making multisession imaging more efficient.\u003c\/li\u003e\n\u003cli\u003eRobust CNC-machined cells with aluminum oxide threads provide reliable mechanical coupling to accessories.\u003c\/li\u003e\n\u003cli\u003eIncludes a full luminance plus RGB suite, so no separate color filter purchases are required to start LRGB imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOnly available in 1.25 in size, so users with differing eyepiece\/filter standards must confirm compatibility.\u003c\/li\u003e\n\u003cli\u003eNot a full specification for exact wavelength cutoffs is provided, so users needing precise bandpasses should verify fit for their workflow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Set\u003c\/td\u003e\n\u003ctd\u003eLRGB (L, R, G, B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Diameter\u003c\/td\u003e\n\u003ctd\u003e1.25 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Construction\u003c\/td\u003e\n\u003ctd\u003eCNC-machined metal, sand-blasted, black anodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eDichroic glass with blocking coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Thread\u003c\/td\u003e\n\u003ctd\u003eAluminum oxide threads, compatible with 1.25 in accessories\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParfocal\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Alstar Deluxe LRGB 1.25 in Filter Set is a practical, well-built option for monochrome CCD users who want to assemble true color images from separate luminance and RGB exposures. Its parfocal design and durable metal cells make it good value for astrophotographers using a filter wheel, though buyers should confirm 1.25 in compatibility with their system.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these filters parfocal?\u003c\/strong\u003e\u003cbr\u003eYes, the filters are parfocal to reduce the need for refocusing between exposures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these work with a filter wheel?\u003c\/strong\u003e\u003cbr\u003eYes, the set is designed for use with a 1.25 in filter wheel and changes smoothly between exposures when mounted in a wheel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the filters block unwanted wavelengths?\u003c\/strong\u003e\u003cbr\u003eThe color filters include blocking coatings and use dichroic glass to improve transmission and reduce unwanted light.\u003c\/p\u003e","brand":"A ALSTAR","offers":[{"title":"Default Title","offer_id":48250162282715,"sku":"B0B5L1D9G9","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61ntob78aOL._AC_SL1500.jpg?v=1771060112","url":"https:\/\/gearmusthave.com\/products\/alstar-deluxe-telescope-lrgb-1-25-in-filter-set-for-monochrome-ccd","provider":"GearMustHave","version":"1.0","type":"link"}