{"product_id":"baader-planetarium-glasspathcorrector-2-inch-1-7x-for-newtons","title":"Baader Planetarium Glasspathcorrector 2\" \/ 1.7x for Newtons","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e1.7x focal length multiplier\u003c\/li\u003e\n\u003cli\u003eEnables binoviewer use in Newtonian telescopes\u003c\/li\u003e\n\u003cli\u003eIntegrated coma corrector for sharp edge-of-field stars\u003c\/li\u003e\n\u003cli\u003eDesigned for 2\" focusers\u003c\/li\u003e\n\u003cli\u003eSolves critical back focus issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eGlasspathcorrector 2\" \/ 1.7x for Newtons\u003c\/h2\u003e\n\u003cp\u003eThe Baader Glasspathcorrector 2\" \/ 1.7x for Newtons is a specialized optical accessory designed to solve two critical problems for Newtonian telescope owners: achieving focus with binoviewers and correcting off-axis coma. This single 2\" unit provides a 1.7x focal length extension, pushing the focal plane outward to accommodate the long light path of a binoviewer, while its integrated coma corrector ensures stars remain sharp across the entire field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 1.7x Solution for Binoviewing in 2\" Newtonian Focusers\u003c\/h3\u003e\n\u003cp\u003eMost Newtonian reflectors are designed with minimal back focus, making it impossible for the focuser to rack in far enough to reach focus with a binoviewer. This corrector multiplies your telescope's focal length by a factor of 1.7x, effectively shifting the focal plane outward to provide the crucial clearance needed for a binoviewer and eyepieces to snap into sharp focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated Coma Correction: Sharp Stars to the Edge in a 2\" Barrel\u003c\/h3\u003e\n\u003cp\u003eFast Newtonians inherently suffer from coma, an optical aberration that distorts stars at the edge of the field into distracting, comet-like shapes. This corrector incorporates a dedicated set of optics that counteract this effect, delivering point-like stars from the center to the edge of the field. This is essential for the immersive, wide-field experience that makes binoviewing so desirable, especially on large star fields and open clusters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary purpose of the Baader 1.7x Glasspathcorrector for Newtons?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary purpose is to allow Newtonian telescope owners to use binoviewers. It solves the two main barriers to this: it extends the focal path by \u003cstrong\u003e1.7x\u003c\/strong\u003e so you can reach focus, and it corrects the coma inherent in Newtonians, ensuring the view is sharp across the entire field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this 1.7x Glasspathcorrector for anything other than a binoviewer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile designed for binoviewers, it can also be used to achieve focus with other long-path accessories, such as certain cameras or off-axis guiders that may require more back focus than your Newtonian provides. However, its primary optical design is optimized for correcting the path length of a binoviewer while also correcting coma.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the 1.7x Glasspathcorrector affect the view in my 12\" f\/4 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a 12\" f\/4 Dobsonian, this corrector will make your telescope operate at f\/6.8 (4 x 1.7). This has two main benefits: first, it will allow your binoviewer to reach focus, which is nearly impossible at f\/4. Second, it will deliver sharply focused, point-like stars to the edge of the field, correcting the significant coma that is prominent in an f\/4 system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Baader 1.7x corrector work with any brand of binoviewer in my Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this corrector is designed to work with virtually any binoviewer that has a 2\" nosepiece or can be adapted to one. Its function is to modify the telescope's light path before it enters the binoviewer, making it broadly compatible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is correcting coma important when binoviewing star clusters like the Pleiades (M45)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen observing a large object like the Pleiades (M45), you are using a wide field of view where stars fill the eyepiece from edge to edge. Without coma correction, stars at the periphery would appear as blurred seagulls, ruining the immersive \"spacewalk\" effect that binoviewers provide. This corrector ensures every star in the cluster remains a pinpoint, preserving the aesthetic of the view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Baader 1.7x Glasspathcorrector require special adapters to fit my 2\" focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, it is designed with a standard 2\" barrel and is meant to be inserted directly into your telescope's 2\" focuser. Your binoviewer would then be inserted into the corrector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (x)\u003c\/td\u003e\n\u003ctd\u003e1.7x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eGlaspath Corrector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e54 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible telescopes\u003c\/td\u003e\n\u003ctd\u003eNewton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":52913117856029,"sku":"BAA-2456300","price":291.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-Glasspathcorrector-2-1-7x-for-Newtons-1_c19b8853-f885-4620-a38b-f292f498ad8a.jpg?v=1789086415","url":"https:\/\/davidastro.com\/en-us\/products\/baader-planetarium-glasspathcorrector-2-inch-1-7x-for-newtons","provider":"David Astro","version":"1.0","type":"link"}