{"title":"Baader Binoviewers","description":"\u003cp\u003eBaader Planetarium binoviewers let you observe with both eyes through one telescope, a relaxed way to study the Moon, planets and bright deep-sky objects. The MaxBright II Binoviewer is offered as a standard set or a complete set with special accessories.\u003c\/p\u003e\u003cp\u003eBecause binoviewers need extra light path, Baader offers glasspath correctors for refractors and SCTs (1.8x), Newtonians (1.7x, with coma correction) and Zeiss ring dovetail models, plus a Maxbright Amici prism with an integral 2x corrector.\u003c\/p\u003e","products":[{"product_id":"baader-maxbright-ii-binoviewer-set","title":"Baader MaxBright II Binoviewer Set","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eModular design based on the Baader T-2 thread system\u003c\/li\u003e\n\u003cli\u003eOptional Glasspath Correctors provide 1.25x, 1.7x, and 2.6x magnification\u003c\/li\u003e\n\u003cli\u003eAccommodates both 1.25\" and 2\" nosepieces for universal telescope compatibility\u003c\/li\u003e\n\u003cli\u003eEnables comfortable, fatigue-free viewing with both eyes\u003c\/li\u003e\n\u003cli\u003eIncludes T-2 and Zeiss micro-bayonet adapters and a padded carrying case\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\u003eBaader MaxBright II Binoviewer Set\u003c\/h2\u003e\n\u003cp\u003eThe Baader MaxBright II Binoviewer Set adapts to nearly any telescope through its modular system of optional 1.25\" and 2\" nosepieces and native T-2 threads. Available Glasspath Correctors (GPCs) at 1.25x, 1.7x, and 2.6x ensure you can reach focus in refractors, Newtonians, and SCTs while providing multiple magnification steps from a single pair of eyepieces.\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\u003eThe MaxBright II System: Ergonomics for Two-Eyed Viewing\u003c\/h3\u003e\n\u003cp\u003eViewing celestial objects with both eyes open reduces eye strain, improves comfort during long observing sessions, and can create a more immersive, almost three-dimensional impression on bright targets like the Moon and planets. The MaxBright II is engineered for this experience, featuring click-lock eyepiece holders and smooth diopter adjustment for a perfectly merged image. The binoviewer body is supplied with both T-2 and Zeiss micro-bayonet adapters, ready to integrate into complex visual or imaging trains.\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\u003eReach Focus with 1.25x, 1.7x, \u0026amp; 2.6x Glasspath Correctors\u003c\/h3\u003e\n\u003cp\u003eA binoviewer's prisms add significant length to the light path, which can prevent some telescopes—especially Newtonians—from reaching focus. Baader's Glasspath Correctors (GPCs) are designed to solve this by compensating for the optical path difference. They also act as a high-quality Barlow lens, with available factors of 1.25x, 1.7x, and 2.6x, effectively turning one pair of eyepieces into three different magnifications.\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\u003eUniversal Connectivity: 1.25\", 2\", and T-2 System Integration\u003c\/h3\u003e\n\u003cp\u003eThe core of the MaxBright II is its native female T-2 thread, making it the central component in Baader's Astro T-2 System. This allows for direct, secure, and perfectly centered connections to a vast range of accessories. Depending on the set purchased, you can attach a standard 1.25\" nosepiece, a rigid 2\" nosepiece for larger focusers, or thread it directly to other T-2 components like diagonals and filter changers for a completely customized optical train.\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\u003eBaader MaxBright II vs. Entry-Level Binoviewers\u003c\/h3\u003e\n\u003cp\u003eWhile more affordable binoviewers provide a good introduction to two-eyed astronomy, the MaxBright II is built as a long-term, adaptable system. Here are the key distinctions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Modularity:\u003c\/strong\u003e Entry-level models typically have a fixed 1.25\" nosepiece. The MaxBright II's T-2 thread system allows it to connect to virtually any focuser or accessory, providing a more rigid and versatile connection that can adapt as your equipment changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Correction:\u003c\/strong\u003e The Baader GPCs are engineered specifically for the MaxBright II to correct the optical path with minimal degradation. This is a critical advantage for achieving focus in \"fast\" optical systems like Newtonian reflectors, where entry-level units often struggle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-Offs:\u003c\/strong\u003e The MaxBright II system represents a greater initial investment, and like all binoviewers, requires you to purchase two identical eyepieces. It also adds weight and length compared to a single eyepiece, which must be considered for mount balancing.\u003c\/li\u003e\n\u003c\/ul\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 main benefit of the Baader MaxBright II over a single eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is \u003cstrong\u003eobserving comfort\u003c\/strong\u003e. Using both eyes reduces strain and fatigue, allowing you to observe for longer periods. Many observers also report a more natural, immersive, or even \"3D-like\" view on bright, detailed objects like the Moon, Jupiter, Saturn, and bright globular clusters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Glasspath Corrector (GPC) for my Baader MaxBright II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt depends on your telescope. \u003cstrong\u003eNewtonian reflectors\u003c\/strong\u003e almost always require a GPC to reach focus. \u003cstrong\u003eRefractors and Schmidt-Cassegrains (SCTs)\u003c\/strong\u003e often have enough focuser travel to work without one, but a GPC can still be useful for adding magnification options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the different GPCs (1.25x, 1.7x, 2.6x) for the MaxBright II change my view?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe GPCs act like a Barlow lens, increasing magnification. With one pair of 25mm eyepieces, for example, you can achieve three distinct magnifications:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25x GPC:\u003c\/strong\u003e Provides a modest power increase, ideal for wide-field scanning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.7x GPC:\u003c\/strong\u003e A great general-purpose increase for framing most deep-sky objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.6x GPC:\u003c\/strong\u003e Delivers high magnification suitable for detailed planetary, lunar, and double-star observation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow can I use the Baader MaxBright II with my 8\" f\/5 Newtonian reflector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor an 8\" f\/5 Newtonian, you will absolutely need a Glasspath Corrector to reach focus. The \u003cstrong\u003e1.7x GPC\u003c\/strong\u003e is an excellent starting point, as it provides enough inward focus correction for most Newtonians. You will also need a 2\" nosepiece to fit your telescope's focuser. The combination of the MaxBright II, the 1.7x GPC, and a 2\" nosepiece will create a robust setup for your reflector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat eyepieces work best with the Baader MaxBright II for viewing Jupiter or the Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor high-resolution planetary and lunar viewing with the Baader MaxBright II, you need two identical, high-quality eyepieces. Plössl or Orthoscopic designs in the \u003cstrong\u003e9mm to 15mm\u003c\/strong\u003e range are excellent choices. When combined with the 1.7x or 2.6x GPC, this focal length range will provide the high magnifications needed to resolve cloud bands on Jupiter or fine crater details on the Moon.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2\" eyepieces with the Baader MaxBright II Binoviewer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Baader MaxBright II, like nearly all astronomical binoviewers, is designed to accept \u003cstrong\u003e1.25\" eyepieces only\u003c\/strong\u003e. The internal prisms and mechanics do not have a large enough clear aperture to accommodate the wider field stops of 2\" eyepieces.\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\u003eAvailable Configurations\u003c\/td\u003e\n\u003ctd\u003eBinoviewer only, Binoviewer w\/ 1.25\" nosepiece, Binoviewer w\/ 2\" nosepiece, Binoviewer w\/ 1:1.25 GPC and 1.25\" nosepiece, Binoviewer w\/ 1:1.7 GPC and 1.25\" nosepiece, Binoviewer w\/ 1:2.65 GPC and 1.25\" nosepiece, Binoviewer w\/ 1:1.25 GPC and 2\" nosepiece, Binoviewer w\/ 1:1.7 GPC and 2\" nosepiece, Binoviewer w\/ 1:2.65 GPC and 2\" nosepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e1.28 (Binoviewer w\/ 1.25\" nosepiece)\u003cbr\u003e1.32 (Binoviewer w\/ 2\" nosepiece)\u003cbr\u003e1.30 (Binoviewer w\/ 1:1.25 GPC and 1.25\" nosepiece)\u003cbr\u003e1.33 (Binoviewer w\/ 1:1.7 GPC and 1.25\" nosepiece, Binoviewer w\/ 1:2.65 GPC and 1.25\" nosepiece, Binoviewer w\/ 1:1.25 GPC and 2\" nosepiece, Binoviewer w\/ 1:1.7 GPC and 2\" nosepiece, Binoviewer w\/ 1:1.2.65 GPC and 2\" nosepiece)\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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_MaxBright_II_Binoviewer_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium MaxBright II Binoviewer Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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 Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Binoviewer only","offer_id":46318677655837,"sku":"BAA-2456460","price":698.0,"currency_code":"CAD","in_stock":true},{"title":"Binoviewer w\/ 1.25\" nosepiece","offer_id":46318677688605,"sku":"BAA-2456460A","price":721.0,"currency_code":"CAD","in_stock":true},{"title":"Binoviewer w\/ 2\" nosepiece","offer_id":46318677721373,"sku":"BAA-2456460B","price":727.0,"currency_code":"CAD","in_stock":true},{"title":"Binoviewer w\/ 1:1.25 GPC and 1.25\" nosepiece","offer_id":46318677754141,"sku":"BAA-2456461","price":845.0,"currency_code":"CAD","in_stock":true},{"title":"Binoviewer w\/ 1:1.7 GPC and 1.25\" nosepiece","offer_id":46318677786909,"sku":"BAA-2456463","price":852.0,"currency_code":"CAD","in_stock":true},{"title":"Binoviewer w\/ 1:2.65 GPC and 1.25\" nosepiece","offer_id":46318677819677,"sku":"BAA-2456465","price":859.0,"currency_code":"CAD","in_stock":true},{"title":"Binoviewer w\/ 1:1.25 GPC and 2\" nosepiece","offer_id":46318677852445,"sku":"BAA-2456462","price":845.0,"currency_code":"CAD","in_stock":true},{"title":"Binoviewer w\/ 1:1.7 GPC and 2\" nosepiece","offer_id":46318677885213,"sku":"BAA-2456464","price":852.0,"currency_code":"CAD","in_stock":true},{"title":"Binoviewer w\/ 1:1.2.65 GPC and 2\" nosepiece","offer_id":46318677917981,"sku":"BAA-2456466","price":859.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-MaxBright-II-Binoviewer-Set-2456460-BINO-1__32027.1597110516.1280.1280.jpg?v=1684339926"},{"product_id":"baader-glasspath-corrector-for-maxbright-bino-and-mark-v","title":"Baader Glasspath Corrector for Maxbright Bino and Mark V","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCorrects for insufficient back focus to allow binoviewer use\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25x, 1.7x, and 2.6x magnification factors\u003c\/li\u003e\n\u003cli\u003eRemoves prism-induced chromatic and spherical aberrations\u003c\/li\u003e\n\u003cli\u003eAttaches via Baader\/Zeiss ring dovetail or standard T-2 threads\u003c\/li\u003e\n\u003cli\u003eEnables multiple magnifications with a single pair of eyepieces\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\u003eBaader Glasspath Corrector for Maxbright \u0026amp; Mark V Binoviewers\u003c\/h2\u003e\n\u003cp\u003eThe Baader Glasspath Corrector is the essential component for using a binoviewer with telescopes that lack sufficient back focus, offering corrective factors of 1.25x, 1.7x, or 2.6x to push the focal plane outwards. This multi-coated lens system simultaneously eliminates color errors introduced by the binoviewer's prisms, sharpening the view in fast optical systems. Its dual mounting system, featuring a Zeiss dovetail and a T-2 (M42x0.75) thread, ensures seamless integration with Baader Maxbright and Mark V binoviewers.\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\u003eAchieving Focus in Any Telescope with 1.25x, 1.7x, and 2.6x Correction\u003c\/h3\u003e\n\u003cp\u003eThe primary function of a Glasspath Corrector (GPC) is to solve the most common barrier to binoviewing: insufficient focuser in-travel. By extending the telescope's focal length, the GPC moves the focus point significantly outward, allowing you to achieve a sharp image where it was previously impossible. The three available factors—1.25x, 1.7x, and 2.6x—allow you to select the precise amount of correction your specific telescope requires.\u003c\/p\u003e\n\u003cp\u003eA Schmidt-Cassegrain might only need the 1.25x corrector, while a Newtonian reflector with very limited back focus will likely require the 1.7x or 2.6x model. This system also acts as a high-quality Barlow lens, effectively tripling the number of magnifications you can achieve with your existing eyepiece pairs.\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\u003eEliminating Prism-Induced Chromatic Aberration\u003c\/h3\u003e\n\u003cp\u003eBeyond its mechanical function, the Baader GPC provides a critical optical correction. The long path of light through a binoviewer's internal prisms can induce noticeable chromatic aberration (false color) and spherical aberration, especially in telescopes with focal ratios of f\/6 or faster. This softens planetary detail and adds distracting color fringing around bright objects like the lunar limb.\u003c\/p\u003e\n\u003cp\u003eThe Glasspath Corrector's specialized lens design counteracts these errors, restoring the high-contrast, color-pure image delivered by your telescope's main objective. The result is a significantly sharper, more satisfying two-eyed view of the Moon, planets, and double stars.\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\u003eDual T-2 and Zeiss Dovetail Mounting for Baader Binoviewers\u003c\/h3\u003e\n\u003cp\u003eDesigned for total system compatibility, the GPC features two mounting methods. It can be screwed directly into the Zeiss ring dovetail found on the Baader Mark V and MaxBright II binoviewers for a secure, direct connection. It also includes a T-2 (M42x0.75) clamping flange, allowing it to be inserted anywhere in a T-2 threaded accessory train.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositional Flexibility:\u003c\/strong\u003e Placing the corrector in front of a T-2 star diagonal, rather than between the diagonal and the binoviewer, can reduce the required optical path by an additional 15mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReconfigurable Optics:\u003c\/strong\u003e The lens elements can be removed from their cell and reversed to optimize performance between different binoviewer models, ensuring the convex lens surface always faces the telescope objective.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e The GPC is engineered to attach directly to Baader T-2 diagonals and various 1.25\" or 2\" nosepieces, creating a rigid and versatile imaging train.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhich Baader Glasspath Corrector factor do I need?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe choice depends entirely on your telescope's available back focus. \u003cstrong\u003e1.25x\u003c\/strong\u003e is for scopes with only a small focus deficit, like many refractors and SCTs. \u003cstrong\u003e1.7x\u003c\/strong\u003e is a versatile mid-range option for many reflectors. \u003cstrong\u003e2.6x\u003c\/strong\u003e provides the most correction and is typically required for Newtonian reflectors that have very little back focus to spare.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Glasspath Corrector work with the Baader Mark V binoviewer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. All three correctors are compatible. The 1.25x and 1.7x models may require the internal lens cell to be unscrewed and flipped for optimal correction with the Mark V, while the 2.6x model works natively. The corrector attaches directly to the Mark V's Zeiss ring dovetail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhere should I install the Baader Glasspath Corrector for the best results?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor the greatest reduction in required back focus, the corrector should be placed as far forward in the optical train as possible. Installing it on the front of your T-2 star diagonal, before the light path is bent 90 degrees, can save approximately 15mm of back focus compared to installing it between the diagonal and the binoviewer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy 8\" f\/10 SCT can't reach focus with a MaxBright II binoviewer. Which corrector should I get?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most Schmidt-Cassegrain telescopes, which typically have generous back focus, the \u003cstrong\u003e1.25x Glasspath Corrector\u003c\/strong\u003e is the ideal starting point. It provides enough outward focus travel to solve the problem without increasing magnification unnecessarily, preserving a wider field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI see color fringing on Jupiter with my f\/5 Newtonian and a binoviewer. Will a Glasspath Corrector help?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This is the second key function of the corrector. The color fringing you see is chromatic aberration introduced by the binoviewer's prisms, which is exaggerated in a \"fast\" f\/5 optical system. The Glasspath Corrector's optics are designed to cancel this specific error, resulting in a much sharper, color-pure image of the planet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Glasspath Corrector for anything besides a binoviewer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Because it uses the standard T-2 thread, you can use a Glasspath Corrector to solve focus issues with other accessories. For example, it can be used to bring a DSLR camera to focus on a telescope that would otherwise not have enough in-travel.\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\u003eMagnification Factors\u003c\/td\u003e\n\u003ctd\u003e1.25x, 1.7x, or 2.6x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Function\u003c\/td\u003e\n\u003ctd\u003eExtends focal point to achieve focus with binoviewers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Function\u003c\/td\u003e\n\u003ctd\u003eCorrects for prism-induced chromatic and spherical aberration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBinoviewer Threads\u003c\/td\u003e\n\u003ctd\u003eBaader \/ Zeiss M34 Ring Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Threads\u003c\/td\u003e\n\u003ctd\u003eT-2 (M42x0.75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eMaxBright, MaxBright II, and Mark V Binoviewers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.02\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\u003eCompatible telescopes\u003c\/td\u003e\n\u003ctd\u003eRefractors, Schmidt-Cassegrain, Newton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e≥ -30 (1:1.25)\u003cbr\u003e-65 (1:1.7)\u003cbr\u003e-120 (1:2.6)\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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Glasspath Corrector\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (Selected Magnification)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Glasspath_Correctors_for_Binoviewers_Product_Information.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Glasspath Correctors for Binoviewers Product Information\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Astro_T-2_System_Parts_List.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Astro T-2 System Parts List\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Astro_T-2_System_Connections_Overview.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Astro T-2 System Connections Overview\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Mark_V_Grossfeld_Giant_Binocular_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Mark V Grossfeld Giant Binocular Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":"1:1.25","offer_id":44967300038941,"sku":"BAA-2456314","price":178.0,"currency_code":"CAD","in_stock":true},{"title":"1:1.7","offer_id":44967300071709,"sku":"BAA-2456316","price":185.0,"currency_code":"CAD","in_stock":true},{"title":"1:2.6","offer_id":44967300104477,"sku":"BAA-2456317","price":193.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Glasspath-Corrector-for-Maxbright-Bino-and-Mark-V-2456314-GLASS-1-1__03383.1597110520.1280.1280.jpg?v=1684340104"},{"product_id":"baader-maxbright-amici-prism-1-25w-integral-2x-glasspath-corrector","title":"Baader Maxbright Amici Prism 1.25\"w\/ Integral 2X Glasspath Corrector","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProvides a fully corrected, erect image for terrestrial viewing\u003c\/li\u003e\n\u003cli\u003eDesigned for the Baader Maxbright Binoviewer\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" barrel format\u003c\/li\u003e\n\u003cli\u003eIntegrated 2X Glasspath Corrector ensures focus can be reached\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\u003eBaader Maxbright Amici Prism 1.25\" w\/ Integral 2X Glasspath Corrector\u003c\/h2\u003e\n      \u003cp\u003eThe Baader Maxbright Amici Prism is a dedicated optical component designed to solve two common challenges with binoviewing: it provides a fully corrected, daytime-friendly image and its integrated 2X Glasspath Corrector ensures your binoviewer can reach focus in telescopes with limited back-focus. This 1.25\" prism is the ideal solution for turning your astronomical telescope into a high-power terrestrial spotting scope for use with the Maxbright Binoviewer.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eErect-Image Views with the 1.25\" Amici Design\u003c\/h3\u003e\n      \u003cp\u003eUnlike standard star diagonals which produce an image that is upright but reversed left-to-right, an Amici prism delivers a completely correct orientation. This makes navigating the lunar surface or tracking moving terrestrial targets like birds or ships intuitive. The 1.25\" barrel fits directly into your telescope's focuser, serving as the diagonal for your Maxbright binoviewer setup.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTerrestrial Viewing:\u003c\/strong\u003e The fully erect image makes the Maxbright Amici Prism essential for daytime observation, transforming your telescope into a powerful binocular spotting scope.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eAstronomical Use:\u003c\/strong\u003e While excellent for casual lunar and wide-field stargazing, the roof-edge design of an Amici prism can introduce a faint diffraction spike on the brightest point-sources like Vega or Jupiter. For critical planetary observation, a traditional prism or mirror diagonal is often preferred.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe Integrated 2X GPC for Focus and Magnification\u003c\/h3\u003e\n      \u003cp\u003eMany telescopes, especially Newtonians, do not have enough inward focuser travel to accommodate the long light path of a binoviewer. The integrated 2X Glasspath Corrector (GPC) solves this by extending the telescope's focal plane outwards, pushing the focus point to where the binoviewer's eyepieces can reach it. This component also doubles the effective focal length of your telescope, providing higher magnification views that are ideal for detailed lunar and planetary observation.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main purpose of the Baader Maxbright Amici Prism?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIts primary purpose is to provide a \u003cstrong\u003efully corrected, erect image\u003c\/strong\u003e (upright and not reversed left-to-right) when using the Baader Maxbright Binoviewer. This is essential for terrestrial, daytime viewing and makes navigating the Moon's surface more intuitive. It also includes an integrated \u003cstrong\u003e2X Glasspath Corrector\u003c\/strong\u003e to help the binoviewer reach focus.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 2X Glasspath Corrector allow my Maxbright Binoviewer to reach focus in my Newtonian telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, this is precisely what the integrated 2X Glasspath Corrector is for. Newtonian reflectors typically have very little back-focus, and a binoviewer alone will not reach focus. The GPC extends the focal plane, making it possible to achieve a sharp image with the Maxbright Binoviewer in most Newtonians.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Baader Maxbright Amici Prism good for high-power planetary viewing of Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile it can be used, it's not the optimal choice for critical planetary viewing. The \"roof\" design of an Amici prism can create a very faint diffraction spike on extremely bright objects like Jupiter, which may slightly soften the finest details. For the highest-contrast planetary views, a dedicated mirror diagonal or a standard prism diagonal (like the Baader T-2 Zeiss Prism) is generally recommended.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Baader Amici Prism without the Maxbright Binoviewer, as a standard diagonal?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this unit is designed as an integrated system for the Maxbright Binoviewer. The Glasspath Corrector's optical properties are calculated to work with the light path of the binoviewer. Using it with a single eyepiece would result in a 2X Barlow effect, but it is not optimized for that application.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does this Baader prism provide a \"correct\" image?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt uses an \u003cstrong\u003eAmici roof prism\u003c\/strong\u003e design. Unlike a simple 90-degree prism or mirror that flips the image once, the roof-shaped surface in an Amici prism introduces an additional reflection. This second reflection corrects the left-right reversal, resulting in an image that matches what you see with your naked eye.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the integrated 2X Glasspath Corrector in the Amici Prism affect image brightness?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, any time you increase magnification, you concentrate the same amount of light over a larger area, which makes the resulting image dimmer. The 2X magnification will result in an image that is four times dimmer than the view at 1X. This is a fundamental principle of optics and applies to any Barlow lens or Glasspath Corrector.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism Type\u003c\/td\u003e\n\u003ctd\u003eAmici Roof Prism\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Factor\u003c\/td\u003e\n\u003ctd\u003e2X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Orientation\u003c\/td\u003e\n\u003ctd\u003eErect, Fully Corrected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eBaader Maxbright Binoviewer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDeflection angle\u003c\/td\u003e\n\u003ctd\u003e45°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003eMulti-Coated (MC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping System\u003c\/td\u003e\n\u003ctd\u003eno clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter \/ Clear Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003evariabel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM28.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eErecting Prism\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflection surface\u003c\/td\u003e\n\u003ctd\u003eTotal reflection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eMaxbright Amici Prism 1.25\" w\/ Integral 2X Glasspath Corrector\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_MaxBright_II_Binoviewer_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium MaxBright II Binoviewer Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Star_Diagonals_T-2_and_2in_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Star Diagonals T-2 and 2in Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\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":44967300170013,"sku":"BAA-2956155","price":139.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Maxbright-Amici-Prism-1-25-inchwith-Integral-2X-Glasspath-Corrector-for-Maxbright-Binoviewer-1__10040.1597110522.1280.1280.jpg?v=1684340109"},{"product_id":"baader-2-newton-1-7x-glasspath-and-coma-corrector","title":"Baader 2\" Newton 1.7X Glasspath and Coma Corrector","description":"\u003c!-- more --\u003e\u003cul\u003e\n\u003cli\u003e2\" Glasspathcorrector\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e\u003c\/span\u003eFactor 1.7 for Newtons - at full aperture with integrated Coma-Corrector. Includes T-2 change ring (#2456320) for adaptation on Maxbright Binocular\u003c\/li\u003e\n\u003cli\u003eSuitable to insert into the Baader Maxbright II and Mark V Großfeld Binocular viewer (insert diameter: ∅ 2\" - 50.8mm, incl. M48 filter thread)\u003c\/li\u003e\n\u003cli\u003eA Baader Glasspathcorrector\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e\u003c\/span\u003eis not a Barlow lens! The reason for this name is only secondly the displacement of the focal point\u003c\/li\u003e\n\u003cli\u003eA Glasspathcorrector\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e\u003c\/span\u003eis primarily intended to correct the prismatic color fringing that occurs on Refractors due to the long glasspath used in binocular prisms\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eUntil now, using a binoviewer with Newtonians has been difficult, owing to the limited back-focus (in-travel) of most telescopes (particularly dobsonians). Some binoviewers require up to 5\" of back-focus, far more than available on any typical Newtonian. Often, users must significantly shorten the truss poles or tube, in order to extend the focal plane (penalizing central obstruction, or increasing vignetting). Another solution has been to use a high powered barlow or small diameter 1.25\" optical corrector\/extender lens, which has the drawback of increasing magnification and significantly reducing the field of view illumination. What is needed is a large aperture low power focal-extender to extend the focal plane of a Newtonian, without excessive amplification or introducing new aberrations. Baader Planetarium enlisted the services of the world-renowned Zeiss APQ optical designer, Dr. Pudenz, to design such a difficult corrector specifically for Newtonians. The Baader 1.7X Newtonian Compensator is the result of this collaboration.\u003c\/p\u003e\u003cp\u003eNot just another me-too optical multiplier\/extender, the complex optical design of the new Baader 2\" Newtonian 1.7X Coma-Correcting Glasspath Compensator provides an extremely sharp and high contrast image on-axis, as well as off-axis -thanks, in part, to it's coma-correcting properties. The design also incorporates glasspath compensation for the spherical aberration and color error inherent in binoviewers.\u003c\/p\u003e\u003cp\u003eIt's large clear aperture avoids vignetting, even with the Baader Mark V Giant Binoviewer. The finest 7 layer multi-coatings available provide extremely high transmission optimized for visual use. Carefully designed and executed internal baffling eliminates all off-axis stray light - pointing the corrector to the light reveals a pitch black interior free of reflections from all internal surfaces (also, threaded for 2\" filters). This is especially important in truss tube Newtonians, where off-axis light may enter the corrector from the side. The result is an almost transparent optical system that won't reduce image quality in any way (it actually improves the off-axis performance).\u003c\/p\u003e\u003cp\u003eEach Newtonian compensator corrector comes ready to attach to the Baader Maxbright-Binocular viewer. Simply screw on the included T2-07 Quick Change Ring to the Maxbright, and the Newtonian Compensator quickly attaches via it's integral quick change dovetail. The compensator also attaches directly to the integral dovetail of the 29mm aperture Baader Mark V Giant Binoviewer.\u003c\/p\u003e\u003cp\u003ePlease Note: The Baader 2\" compensator has been designed first, and foremost, for high image quality. While the Newtonian Compensator greatly reduces the needed back-focus, in order to achieve such high image quality, some back-focus is still required. When used with the Baader Mark V binocular viewer, approximately 32-38mm of telescope back-focus (focuser in-travel) is needed. The Baader Maxbright-Binocular Viewer requires approximately 30-36mm of back-focus. This value is approximate, and depends on the specific eyepiece used and any focus correction that is required by the observer's eyesight. This distance is Not adjustable (unlike some bino multiplier\/extenders). Changing the optical spacing (and amplification factor) in order to vary back-focus compromises the optical performance and results in a reduction of image quality. For help in determining your telescope's back-focus, please click on the Back-Focus link.\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967300235549,"sku":"BAA-2456301","price":317.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-2-inch-Newton-1-7X-Glasspath-and-Coma-Corrector-1__04385.1597110522.1280.1280.jpg?v=1684340111"},{"product_id":"baader-2-refractor-sct-1-8x-glasspath-corrector","title":"Baader 2\" Refractor\/SCT 1.8X Glasspath Corrector","description":"\u003c!-- more --\u003e\u003cul\u003e\n\u003cli\u003e2\" Glasspathcorrector\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e\u003c\/span\u003eFactor 1.8 for Refractors and Schmidt Cassegrains - at full aperture.\u003c\/li\u003e\n\u003cli\u003eSuitable to insert into the Baader Maxbright and Mark V Großfeld Binocular viewer (insert diameter: ∅ 2\" - 50,.8mm, incl. M48 filter thread)\u003c\/li\u003e\n\u003cli\u003eYou will also need a T-2 diagonal and only for the Mark V Binocular a T-2 change ring (#2456320) to change to 90°. The optical lengths have to be exact so we can only recommend this combination\u003c\/li\u003e\n\u003cli\u003eA Baader Glasspathcorrector\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e\u003c\/span\u003eis not a Barlow lens! The reason for this name is only secondarily the displacement of the focal point\u003c\/li\u003e\n\u003cli\u003eA Glasspathcorrector\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e\u003c\/span\u003eis primarily intended to correct the prismatic color fringing that occurs on Refractors due to the \u003cspan\u003elong glasspath used\u003c\/span\u003e used in binocular prisms\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967300268317,"sku":"BAA-2456305","price":322.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-2-inch-Refractor-SCT-1-8X-Glasspath-Corrector-1__38757.1597110523.1280.1280.jpg?v=1684340112"},{"product_id":"baader-auxillary-ring-for-adaptation-of-maxbright-ii","title":"Baader Auxillary-Ring for Adaptation of MaxBright II","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCreates the shortest possible connection for a MaxBright II Binoviewer\u003c\/li\u003e\n\u003cli\u003eDesigned for direct attachment to any Baader T-2 star diagonal\u003c\/li\u003e\n\u003cli\u003ePrevents unintended rotation and accidental detachment of the binoviewer\u003c\/li\u003e\n\u003cli\u003eFunctions as a slip ring to allow for interpupillary distance adjustment\u003c\/li\u003e\n\u003cli\u003eRequires Baader T-2 Locking Ring #2458271 for full functionality (sold separately)\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\u003eBaader Auxillary-Ring for Adaptation of MaxBright II\u003c\/h2\u003e\n\u003cp\u003eThe Baader Auxillary-Ring is a dedicated component engineered to create the most compact, rigid, and secure connection between a MaxBright II Binoviewer and any Baader T-2 star diagonal. This ring system solves the common issues of binoviewer rotation and instability by providing a direct, locked-in attachment that prevents any unintended movement during observation or eyepiece changes.\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\u003eSecure, Low-Profile MaxBright II to T-2 Diagonal Adaptation\u003c\/h3\u003e\n\u003cp\u003eThis ring enables the shortest possible adaptation of the MaxBright II directly onto a T-2 prism or mirror diagonal. Its primary function is to act as a slip ring, placed between the binoviewer body and the required T-2 locking ring. This clever design allows you to securely lock the binoviewer's rotational position while still permitting smooth adjustment of the interpupillary distance, ensuring both mechanical stability and user comfort.\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\u003eRequired Component: Baader T-2 Locking Ring (#2458271)\u003c\/h3\u003e\n\u003cp\u003eTo achieve the secure, rotation-proof connection, this Auxillary-Ring must be used in conjunction with the Baader T-2 Locking Ring (#2458271), which is sold separately. The locking ring threads onto the binoviewer's T-2 connection and is tightened against the auxillary ring, creating a firm lock. The locking ring's handle can be repositioned into one of three threaded holes, spaced 120° apart, to ensure it never obstructs your view or access to the eyepieces.\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 purpose of the Baader Auxillary-Ring for the MaxBright II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader Auxillary-Ring is designed to provide the shortest and most secure connection possible between a Baader MaxBright II Binoviewer and a Baader T-2 star diagonal. It prevents the binoviewer from rotating or accidentally unscrewing during use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need any other parts to use this Auxillary-Ring with my MaxBright II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes, this part is not standalone.\u003c\/strong\u003e You must use it with the \u003cstrong\u003eBaader T-2 Locking Ring (#2458271)\u003c\/strong\u003e, which is sold separately. The Auxillary-Ring acts as a slip ring, and the Locking Ring provides the tension to lock the binoviewer in place.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this ring system prevent my MaxBright II from rotating on my T-2 diagonal?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Auxillary-Ring sits between the binoviewer and the separate locking ring. Once you thread the binoviewer onto your T-2 diagonal, you tighten the locking ring against the Auxillary-Ring. This creates firm pressure that locks the entire assembly, preventing any rotation while still allowing interpupillary distance adjustments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I still adjust the interpupillary distance on my MaxBright II with this ring installed?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Auxillary-Ring is specifically designed to function as a slip ring. This means that even when the connection to the diagonal is locked tight against rotation, the mechanism for adjusting the distance between the eyepieces on the MaxBright II remains fully functional.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader Auxillary-Ring work with non-Baader diagonals?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis ring is specifically designed for the Baader ecosystem, ensuring a perfect fit between the MaxBright II Binoviewer and Baader's T-2 star diagonals (both prism and mirror types). Compatibility with third-party diagonals is not guaranteed, as thread depths and tolerances can vary.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install the Baader Auxillary-Ring system on my MaxBright II and T-2 diagonal?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFirst, ensure you have both this Auxillary-Ring and the required Baader T-2 Locking Ring (#2458271).\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRemove any existing counter nut or dovetail ring from the binoviewer's T-2 thread.\u003c\/li\u003e\n\u003cli\u003eThread the Locking Ring onto the binoviewer's male T-2 thread, but don't tighten it.\u003c\/li\u003e\n\u003cli\u003ePlace the Auxillary-Ring between the Locking Ring and the binoviewer body, with the raised surface facing the binoviewer.\u003c\/li\u003e\n\u003cli\u003eScrew the entire assembly onto your Baader T-2 diagonal until it's snug.\u003c\/li\u003e\n\u003cli\u003eRotate the binoviewer to your desired orientation, then tighten the Locking Ring firmly against the Auxillary-Ring to lock it in place.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Adapter\u003c\/td\u003e\n\u003ctd\u003eSame-Thread Adapter, Variable Focusing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage\u003c\/td\u003e\n\u003ctd\u003efor Adaptation of MaxBright II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM34\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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_MaxBright_II_Binoviewer_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium MaxBright II Binoviewer Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":44967300301085,"sku":"BAA-2458272","price":15.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Auxillary-Ring-for-Adaptation-of-MaxBright-II-1__32291.1597110525.1280.1280.jpg?v=1684340114"},{"product_id":"baader-t-2-locking-ring-w-lever-for-maxbright-ii","title":"Baader T-2 Locking Ring w\/ Lever for MaxBright II","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCreates a rigid, direct-thread connection for binoviewers\u003c\/li\u003e\n\u003cli\u003eEnables precise rotational adjustment and locking\u003c\/li\u003e\n\u003cli\u003eFeatures a repositionable lever for ergonomic comfort\u003c\/li\u003e\n\u003cli\u003eHelps shorten the optical path to achieve focus\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for the MaxBright II Binoviewer\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\u003eBaader T-2 Locking Ring w\/ Lever for MaxBright II\u003c\/h2\u003e\n\u003cp\u003eThe Baader T-2 Locking Ring with Lever replaces the standard counter nut on a MaxBright II binoviewer, creating a solid, direct-thread connection to your T-2 star diagonal or focuser. This upgrade provides a shorter, more rigid optical train, ideal for achieving focus in demanding systems and ensuring your binoviewer remains securely fixed in any orientation. It is the definitive solution for eliminating flexure and achieving precise rotational alignment.\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\u003eDirect Connection for a Shorter, Rigid Optical Path\u003c\/h3\u003e\n\u003cp\u003eBy screwing your binoviewer directly onto a T-2 star diagonal or compatible focuser, this locking ring minimizes the total length of your imaging train. This shortened path is often critical for reaching focus in telescopes with limited back focus, such as Schmidt-Cassegrains. The rigid, all-threaded connection also eliminates any potential for sag or flexure that can occur with slip-fit adapters, keeping your optics perfectly aligned.\u003c\/p\u003e\n\u003cp\u003eThis secure attachment makes the locking ring an excellent choice for public observatories or outreach events. It prevents the binoviewer from being accidentally loosened or removed, ensuring equipment safety during frequent use.\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\u003eRotational Lock and Adjustable Lever for Ergonomic Control\u003c\/h3\u003e\n\u003cp\u003eThe primary function of the ring is to allow you to orient the binoviewer to the most comfortable viewing angle and then lock it firmly in place with the attached lever. This prevents unwanted rotation while you observe or adjust the interpupillary distance.\u003c\/p\u003e\n\u003cp\u003eFor added convenience, the control lever itself is repositionable. If it comes to rest in an awkward position or interferes with other equipment, you can unscrew it and move it to one of several threaded holes spaced around the ring's circumference, ensuring comfortable and unobstructed operation in any telescope configuration.\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 main purpose of the Baader T-2 Locking Ring for the MaxBright II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts main purpose is to replace the standard T-2 counter nut to create a more \u003cstrong\u003erigid, secure, and shorter\u003c\/strong\u003e connection between a MaxBright II binoviewer and a T-2 star diagonal or focuser. This allows for precise rotational positioning and helps in achieving focus on telescopes with limited back focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this locking ring improve the connection over a standard T-2 counter nut?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard counter nut can sometimes loosen, allowing the binoviewer to rotate unexpectedly. The \u003cstrong\u003eBaader T-2 Locking Ring with Lever\u003c\/strong\u003e provides a much more positive and secure lock, completely preventing any rotational shift once tightened. This results in a connection that feels like a single, solid unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I still adjust the interpupillary distance on my MaxBright II with this ring installed?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The locking ring secures the rotational position of the entire binoviewer body on the telescope's optical axis. It does not interfere with the separate mechanism that allows you to adjust the distance between the eyepieces (interpupillary distance).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Baader T-2 Locking Ring recommended for public outreach or observatory use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor public or permanent setups, security and robustness are key. The Baader T-2 Locking Ring creates a direct-threaded connection that cannot be accidentally loosened or removed like a standard slip-fit or compression ring adapter. This ensures the binoviewer stays securely attached, even with frequent handling by many different users.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat if the locking lever on the Baader T-2 Locking Ring ends up in an awkward position?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe lever is designed to be repositioned. It is threaded into the outer circumference of the ring. If it stops in a position that is hard to reach or blocks other accessories, you can simply unscrew it and move it to one of the other available threaded holes on the ring for better ergonomic placement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this locking ring help shorten the optical path when using my MaxBright II on an SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a significant advantage. By enabling the most direct connection possible and eliminating the space taken up by other adapters, the \u003cstrong\u003eBaader T-2 Locking Ring\u003c\/strong\u003e helps shorten the overall light path. This can be the critical factor that allows a binoviewer to reach focus on a Schmidt-Cassegrain (SCT) or other telescope with limited back focus.\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\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eBaader MaxBright II Binoviewer and T-2 System Components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eRotational Locking and Secure Threaded Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Adapter\u003c\/td\u003e\n\u003ctd\u003eSame-Thread Adapter, Variable Focusing\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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_MaxBright_II_Binoviewer_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium MaxBright II Binoviewer Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":44967300333853,"sku":"BAA-2458271","price":53.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-T-2-Locking-Ring-with-Lever-for-MaxBright-II-1__16481.1597110527.1280.1280.jpg?v=1684340128"},{"product_id":"baader-planetarium-1-25-inch-extension-tube-for-long-focal-length-eyepieces","title":"Baader Planetarium 1.25\" Extension Tube for Long Focal Length Eyepieces","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables Use of 30-42mm Eyepieces in Baader Maxbright Binoviewers\u003c\/li\u003e\n\u003cli\u003eSolves Image Merging Failures with Long Focal Length Designs\u003c\/li\u003e\n\u003cli\u003eExtends Eyepiece Barrel to Achieve Proper Focal Plane Alignment\u003c\/li\u003e\n\u003cli\u003eMaintains Standard 1.25\" Format for Eyepieces and Holders\u003c\/li\u003e\n\u003cli\u003eRequires a Matched Pair (2 pieces) for Binocular Viewing\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\u003eBaader 1.25\" Extension Tube for Long Focal Length Eyepieces\u003c\/h2\u003e\n      \u003cp\u003eThis Baader 1.25\" Extension Tube is the specific mechanical solution required to use long focal length eyepieces, particularly those in the 30mm to 42mm range, with a Baader Maxbright Binoviewer. A set of 2 tubes is mandatory—one for each optical path—to physically reposition the eyepieces outward, allowing your eyes to merge the two light paths into a single, cohesive image.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eAchieve Image Merge with 30-42mm Eyepieces\u003c\/h3\u003e\n      \u003cp\u003eMany classic long focal length eyepieces, such as 32mm or 40mm Plössls, have a focal plane located deep within their barrel. When used in a binoviewer, the body of the binoviewer can prevent these eyepieces from seating deep enough to reach focus, resulting in an inability to merge the two images. These 1.25\" extension tubes act as simple spacers, moving the eyepieces slightly out from the binoviewer's holders. This adjustment correctly aligns each eyepiece's focal plane with the binoviewer's optical path, solving the merging problem and enabling comfortable, immersive views.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy do I need the Baader 1.25\" Extension Tube for my Maxbright binoviewer?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou need a pair of these tubes if you use long focal length eyepieces (typically \u003cstrong\u003e30mm to 42mm\u003c\/strong\u003e) that cannot achieve a merged image. Their physical design prevents them from seating deep enough in the binoviewer to align with the optical path. These extensions provide the necessary spacing to correct this and allow for a single, merged view.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use just one Baader 1.25\" Extension Tube?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. For binoviewing, you must use \u003cstrong\u003etwo identical optical trains\u003c\/strong\u003e. You will need a matched pair of these extension tubes, one for each eyepiece, to ensure that both eyes are viewing through an identical setup, which is critical for image merging and avoiding eye strain.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this extension tube work with eyepieces shorter than 30mm?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThese tubes are generally not necessary for eyepieces with focal lengths shorter than 30mm. Most shorter focal length eyepieces do not have the same deep-set focal plane and will reach focus in the Maxbright binoviewer without any adapters.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Baader 1.25\" Extension Tube add any optical elements or affect image quality?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this is a purely mechanical adapter. It is a hollow tube that contains no lenses or glass. It simply changes the physical position of your eyepiece and does not alter the optical properties or introduce any degradation to the image quality.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI have a pair of 32mm Plössls for my Maxbright II binoviewer; will these tubes help me merge the image in my 8\" SCT?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, this is the exact scenario these tubes are designed for. A pair of 32mm Plössls is a classic example of an eyepiece that struggles to merge in a binoviewer. Using a pair of these 1.25\" extension tubes will provide the correct spacing to achieve a clean, merged image in your SCT setup.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader 1.25\" Extension Tube work with other binoviewers?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile designed specifically for the Baader Maxbright series, this 1.25\" extension tube may work with other binoviewers that exhibit the same issue with long focal length eyepieces. However, compatibility is not guaranteed, as the required spacing can vary between different binoviewer models.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\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\u003e0.05\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eUNC, Baader Planetarium, Celestron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter \/ Clear Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Adapter\u003c\/td\u003e\n\u003ctd\u003eExtension, Filter holder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM28.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdaptable to\u003c\/td\u003e\n\u003ctd\u003eBaader Maxbright\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\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":52913115988253,"sku":"BAA-2456325","price":49.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-1-Extension-tube-for-long-focal-length-eyepieces-on-binoviewers-1_8d0863a9-2bea-47cc-be91-eceaf9b5d2a3.jpg?v=1789086387"},{"product_id":"baader-planetarium-glasspathcorrector-for-baader-binoviewer-with-zeiss-ring-dovetail-maxbright-ii-and-mark-v","title":"Baader Planetarium Glasspathcorrector for Baader-Binoviewer with Zeiss ring dovetail (MaxBright® II and Mark V)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAvailable in 1.25x and 1.7x magnification factors\u003c\/li\u003e\n\u003cli\u003eCorrects prism-induced color aberrations in fast telescopes\u003c\/li\u003e\n\u003cli\u003eExtends optical path to solve backfocus issues\u003c\/li\u003e\n\u003cli\u003eConnects via Zeiss ring dovetail\u003c\/li\u003e\n\u003cli\u003eCompatible with Baader MaxBright® II and Mark V Binoviewers\u003c\/li\u003e\n\u003cli\u003e1.25x for the widest fields, 1.7x (with T-2 clamping flange) for larger focus shortfalls\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 for Baader-Binoviewer with Zeiss ring dovetail (MaxBright® II and Mark V)\u003c\/h2\u003e\n\u003cp\u003eThe Baader Glasspathcorrector is a critical optical accessory designed to solve two fundamental challenges of binoviewing: it corrects prism-induced color aberrations in fast telescopes and extends the focal path to achieve focus. Available with a 1.25x or 1.7x magnification factor, the corrector attaches directly to the Zeiss ring dovetail on Baader's MaxBright® II and Mark V binoviewers, enabling sharp, color-pure stereo views in optical systems that otherwise lack sufficient backfocus.\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\u003eSolving Backfocus and Color Aberration with 1.25x or 1.7x Magnification\u003c\/h3\u003e\n\u003cp\u003eMany telescopes, particularly Newtonians and certain refractors, do not have enough inward focuser travel to accommodate the long light path of a binoviewer. The Glasspathcorrector pushes the focal plane outwards, allowing you to reach a sharp image without modifying your telescope. Simultaneously, it acts as a color corrector, neutralizing the chromatic aberration introduced by the binoviewer's prisms, which is most apparent in telescopes with fast focal ratios.\u003c\/p\u003e\n\u003cp\u003eBeyond its corrective properties, this accessory multiplies your eyepiece magnification by the selected factor. The 1.25x version alters your telescope's native focal length as little as possible, preserving nearly the full true field of your low-power eyepieces for large targets like the Andromeda Galaxy (M31). The 1.7x version effectively expands your eyepiece collection, providing higher-power views for planetary and lunar observation without needing to swap out eyepiece pairs.\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\u003eMounting the Corrector: Zeiss Dovetail \u0026amp; T-2 Versatility\u003c\/h3\u003e\n\u003cp\u003eDesigned for seamless integration, both versions of the Glasspathcorrector thread directly into the Zeiss ring dovetail found on the front of the Baader MaxBright® II and Mark V Giant Binoviewers. This threaded connection provides a rigid, flexure-free and perfectly collimated optical train, unlike solutions that stack 1.25\" nosepieces. On the 1.7x model, the lens cell is reversible, with the convex side always facing the telescope objective for correct optical performance.\u003c\/p\u003e\n\u003cp\u003eFor broader applications, the 1.7x unit also includes a T-2 clamping flange. This allows the corrector to be inserted between any male and female T-2 (M42x0.75) threaded connection, making it a universal backfocus solution for other accessories like DSLRs or specialized cameras that struggle to reach 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\u003eGlasspathcorrector 1.25x vs. 1.7x: Choosing the Right Factor\u003c\/h3\u003e\n\u003cp\u003eBaader offers multiple Glasspathcorrectors, and the choice depends entirely on your telescope's available backfocus. The primary trade-off is between the amount of focus extension and the magnification increase.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlasspathcorrector 1.25x:\u003c\/strong\u003e This corrector provides a smaller shift in the focal plane. It is the ideal choice if your telescope is close to reaching focus but just needs a small amount of help, as most refractors and SCTs are. The lower magnification factor also results in a wider true field of view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlasspathcorrector 1.7x:\u003c\/strong\u003e This model offers a more significant outward shift of the focal point. It is designed for telescopes with substantial backfocus shortages, such as most Newtonian reflectors, ensuring you can achieve a sharp image where the 1.25x model might fall short. The trade-off is a higher magnification and a correspondingly narrower field of view.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhy do I need a Glasspathcorrector for my Baader binoviewer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need a \u003cstrong\u003eGlasspathcorrector\u003c\/strong\u003e if your telescope cannot reach focus with a binoviewer attached. The long optical path of the binoviewer requires significant \"in-focus\" travel that many telescopes lack. This corrector pushes the focus point out, solving the problem. It also corrects for color fringing caused by the prisms, especially in fast (low f-ratio) telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich factor should I choose for my 8\" SCT and a MaxBright II binoviewer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSchmidt-Cassegrain telescopes (SCTs) typically have a large range of focus travel. The \u003cstrong\u003e1.25x\u003c\/strong\u003e lets you reach focus easily while keeping magnification low enough to frame the entire Orion Nebula (M42) with a pair of low-power eyepieces. The \u003cstrong\u003e1.7x\u003c\/strong\u003e provides a significant boost in magnification, which is excellent for detailed views of planets like Jupiter and Saturn, or for splitting tight double stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Glasspathcorrector attach to the binoviewer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe corrector threads directly into the \u003cstrong\u003eZeiss ring dovetail\u003c\/strong\u003e on the telescope-side of the Baader MaxBright® II or Mark V Giant Binoviewer; it is not compatible with binoviewers that use a standard 1.25\" or 2\" nosepiece interface. The 1.7x can also be placed within a T-2 threaded system using its clamping flange, typically in front of a T-2 star diagonal to save the maximum amount of optical path length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the main difference between the Baader 1.25x and 1.7x Glasspathcorrectors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main difference is the amount of backfocus correction they provide.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003e1.25x corrector\u003c\/strong\u003e is for telescopes that need only a small amount of help to reach focus, and gives a wider true field of view.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003e1.7x corrector\u003c\/strong\u003e is for telescopes with a significant backfocus shortfall.\u003c\/li\u003e\n\u003c\/ul\u003e\nChoose the 1.7x model if you have a Newtonian reflector or another telescope design known for limited backfocus.\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use a Glasspathcorrector to bring my DSLR camera to focus on my Dobsonian telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a potential application of the 1.7x version, which includes a T-2 clamping flange. Many Newtonian telescopes like Dobsonians cannot reach prime focus with a DSLR. By inserting the \u003cstrong\u003eGlasspathcorrector 1.7x\u003c\/strong\u003e into the T-2 threaded adapter on your camera, you can extend the focal point outward enough to achieve a sharp image, effectively acting like a Barlow lens for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes a Glasspathcorrector degrade the image quality?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, quite the opposite. The Glasspathcorrector is a high-quality optical element designed to \u003cstrong\u003eimprove\u003c\/strong\u003e the final image. It specifically corrects for color aberrations (chromatic aberration) that are introduced by the binoviewer's prisms, leading to sharper, more color-pure views than using a binoviewer without one in a fast telescope.\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\u003e0.02\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\u003eCompatible telescopes\u003c\/td\u003e\n\u003ctd\u003eRefractors, Schmidt-Cassegrain, Newton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM34, M42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e1.25x\u003c\/h3\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eGlasspathcorrector for Binoviewer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification Factor\u003c\/td\u003e\n\u003ctd\u003e1.25x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBinoviewer Compatibility\u003c\/td\u003e\n\u003ctd\u003eBaader MaxBright® II, Baader Mark V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-Side Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" Barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBinoviewer-Side Connection\u003c\/td\u003e\n\u003ctd\u003eZeiss Ring Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e≥ -30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e1.7x\u003c\/h3\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eGlasspathcorrector for Binoviewer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification Factor\u003c\/td\u003e\n\u003ctd\u003e1.7x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBinoviewer Compatibility\u003c\/td\u003e\n\u003ctd\u003eBaader MaxBright® II, Baader Mark V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBinoviewer-Side Connection\u003c\/td\u003e\n\u003ctd\u003eZeiss Ring Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditional Connection\u003c\/td\u003e\n\u003ctd\u003eT-2 (M42x0.75) clamping flange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics\u003c\/td\u003e\n\u003ctd\u003eMulti-coated, reversible lens cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eExtends optical path, corrects prism-induced color aberrations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification (x)\u003c\/td\u003e\n\u003ctd\u003e1 : 1.70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e-65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n  \u003cdiv class=\"DAV-section-center\"\u003e\n    \u003cp\u003eGlasspathcorrector with Zeiss Ring Dovetail in selected factor (1.25x or 1.7x) × 1; the 1.7x also includes a T-2 clamping flange\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Glasspath_Correctors_for_Binoviewers_Product_Information.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Glasspath Correctors for Binoviewers Product Information\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Astro_T-2_System_Parts_List.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Astro T-2 System Parts List\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Astro_T-2_System_Connections_Overview.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Astro T-2 System Connections Overview\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Mark_V_Grossfeld_Giant_Binocular_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Mark V Grossfeld Giant Binocular Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":"1.25x","offer_id":52913116283165,"sku":"BAA-2456314Z","price":178.0,"currency_code":"CAD","in_stock":true},{"title":"1.7x","offer_id":52913116315933,"sku":"BAA-2456316Z","price":185.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-Glasspathcorrector-1-25x-for-Baader-Binoviewer-with-Zeiss-ring-dovetail-MaxBright-II-and-Mark-V-1_25d69e9f-e75d-40cd-80d4-aed3b62cd8dc.jpg?v=1789086397"},{"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":316.0,"currency_code":"CAD","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\/collections\/baader-binoviewers.oembed","provider":"David Astro","version":"1.0","type":"link"}