{"product_id":"vixen-extender-ph-set-for-r200ss","title":"Extender PH Set for R200SS","description":"\u003c!--start tab--\u003e\n\u003ch1 id=\"description\"\u003eFeatures\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eIncreases the focal length by a factor of 1.4\u003c\/li\u003e\n\u003cli\u003eThe focal length of the R200SS is increased to 1120 mm (F5.6)\u003c\/li\u003e\n\u003cli\u003eInterior matte surface prevents reflections\u003c\/li\u003e\n\u003cli\u003eSpecial anti-reflective AS coating\u003c\/li\u003e\n\u003cli\u003e99.9% light transmission per lens surface\u003c\/li\u003e\n\u003cli\u003eConstruction: 4 elements in 3 groups\u003c\/li\u003e\n\u003cli\u003eWeight: 245 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!--end tab--\u003e\u003c!--start tab--\u003e\n\u003ch1 id=\"description\"\u003eDescription\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe best focal extender designed for Newtonian telescopes for serious astrophotography.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMade in Japan and designed for astrophotography, this premium extender lens system converts the R200SS parabolic mirror Newton reflector into an F5.6 astrograph. The Extender PH kit was developed to increase the focal length by a factor of 1.4x It increases the focal length of the 800mm (F4) R200SS Newton reflector to 1120 mm (F5.6).\u003c\/p\u003e\n\u003cp\u003eThe optical system structure of 4 elements in 3 groups corrects the coma error to render sharp images up to the edge of the field of view. The extender illuminates the field of a full-frame camera (44 image circle). When used in combination with the eyepiece adapter, the 31.7 mm eyepiece can be used for visual observations.\u003c\/p\u003e\n\u003cp\u003eThe same anti-reflective AS coatings used on our high-end VSD 100 f\/3.8 astrograph are also used here to provide an outstanding light transmission of 99.9% per lens surface.\u003c\/p\u003e\n\u003cp\u003eThe completely matte surface in the interior keeps loss of light, ghosting and scattered light to a minimum. When used with the 50.8 mm eyepiece adapter, the extender PH kit provides a high-performance Barlow lens for visual observations and eliminates coma and aberrations over the entire field of view.\u003c\/p\u003e\n\u003c!--end tab--\u003e\u003c!--start tab--\u003e\n\u003ch1 id=\"specs\"\u003eSpecs\u003c\/h1\u003e\n\u003ctable\u003e\n\u003ccolgroup\u003e \u003ccol\u003e \u003c\/colgroup\u003e\n\u003cthead\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification\u003c\/td\u003e\n\u003ctd\u003e1.4X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal length\u003c\/td\u003e\n\u003ctd\u003eR200SS: 800mm (F4) to 1120mm (F5.6)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical coatings\u003c\/td\u003e\n\u003ctd\u003eAS coatings (More than 99.9% light transmission per surface)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003e4 elements in 3 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread diameter and thread pitch\u003c\/td\u003e\n\u003ctd\u003eM56mm, 0.75mm (male), or fits to 50.8mm visual back\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter size\u003c\/td\u003e\n\u003ctd\u003e48mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVisual observing\u003c\/td\u003e\n\u003ctd\u003ePossible with an optional Eyepiece adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions and weight\u003c\/td\u003e\n\u003ctd\u003e56mm x 128mm long, 245 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!--end tab--\u003e\u003c!--start tab--\u003e\n\u003ch1 id=\"warranty\"\u003eWarranty\u003c\/h1\u003e\n\u003cp\u003eVixen warranties its products to be free from initial defects in materials and workmanship for a specified period based on part type:\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eVixen Electronic Parts: Limited One Year Warranty \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eVixen Mechanical Parts: Limited Two Year Warranty \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0390\/6029\/files\/Vixen_Distributor_Warranty_2021.pdf?v=1638896591\" target=\"_blank\"\u003eClick Here to read more\u003c\/a\u003e\u003c\/p\u003e\n\u003c!--end tab--\u003e\n\u003cp style=\"font-size: 16px;\"\u003eCA Residents: \u003ca href=\"https:\/\/explorescientific.com\/pages\/prop65\" target=\"_blank\"\u003eProp 65 WARNING(S)\u003c\/a\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":45643719606513,"sku":"ES37238","price":540.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/5711\/6312\/files\/37238_6-C001copy.jpg?v=1736424879","url":"https:\/\/villohome.com\/products\/vixen-extender-ph-set-for-r200ss","provider":"Villohome","version":"1.0","type":"link"}