{"product_id":"used-optolong-lrgb-filters-4-pieces","title":"Used Optolong 2\" LRGB Filters (4 pieces)","description":"\u003cp\u003e\u003cstrong\u003eCondition: \u003c\/strong\u003e This is a set of 2\" Optolong LRGB filters that are in excellent condition:  clean optical surfaces.  These come in their original jewel cases and boxes.  This is a nice savings off of the new set at $359.  Enjoy!  \u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAny dust you see in the photos is easily removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.  \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDeep Sky Broadband CCD Filters: Luminance, Red, Green, and Blue\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThe LRGB telescope filter Kit\u003c\/strong\u003e is designed for maximum contrast and with extremely high gradients for clear differentiation of colors of light.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis set divides the spectrum into its components:  red, green, blue and luminance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589 nm and improves color balance and separation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eWorks well with debayered monochrome CCD cameras\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for deep sky and planetary CCD imaging\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRGB-imaging allows equal weighting factors for each channel, which is very important for automated imaging.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe ideal raw material for image processing in the sRGB color space is available with LRGB filter set and a mono CCD camera. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSchott substrate material\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThickness 2.0 mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptically polished to ensure accurate 1\/4 wavefront and \u0026lt;30 seconds parallelism over both surfaces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e95% transmission at bandpass\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInfrared wavelength 700 to 1100 nm cut-off\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrecision off-band blocking\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTavg: T\u0026gt;95%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCoating Wavelength: 300-1050nm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptical Density: OD3\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCoating Parameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMulti-layered anti-reflection coatings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNon-cemented optical substrate coatings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eElectron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength); no deviation affected by temperature change\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Cell\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUltra-thin filter cell minimizes vignetting by maximizing the possible clear aperture (clear aperture is 26 mm for 1.25-inch; 45 mm for 2-inch)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAerometal Material\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrecise CNC Machining\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSand Blasting Process\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBlack Anodized Finish\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExtinction Treatment to Prevent Reflection\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLaser Engraving No Fading\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePackage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlastic PP Case\u003c\/li\u003e\n\u003cli\u003eImported High Pressure EVA Case Lining\u003c\/li\u003e\n\u003cli\u003eSilver Cardboard Box\u003c\/li\u003e\n\u003cli\u003eHigh Density Sponge Carton Lining\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSizes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard 1.25”\u003c\/li\u003e\n\u003cli\u003eStandard 2”\u003c\/li\u003e\n\u003cli\u003eRound 31mm Unmounted\u003c\/li\u003e\n\u003cli\u003eRound 36mm Unmounted\u003c\/li\u003e\n\u003cli\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"2\"","offer_id":47953284563203,"sku":"U2603-BM-AT200006","price":250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/16a5cb56-679d-479d-81f5-bbb1f02435e0.jpg?v=1776544535","url":"https:\/\/milehighastro.com\/products\/used-optolong-lrgb-filters-4-pieces","provider":"Mile High Astronomy","version":"1.0","type":"link"}