{"product_id":"baader-planetarium-adapter-m54i-to-s52a-for-wide-t-rings","title":"Baader Planetarium Adapter M54i to S52a – for Wide-T-Rings","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts Baader S52 Wide T-Rings to M54 male threads\u003c\/li\u003e\n\u003cli\u003eProvides a secure, threaded connection to prevent camera tilt\u003c\/li\u003e\n\u003cli\u003eMaintains maximum clear aperture to minimize vignetting\u003c\/li\u003e\n\u003cli\u003eCreates a rigid connection for astrophotography\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\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\u003eAdapter M54i to S52a – for Wide-T-Rings\u003c\/h2\u003e\n\u003cp\u003eThe Baader Adapter M54i to S52a provides a direct, secure connection between any Baader Wide T-Ring with an S52 dovetail and accessories featuring an M54 male thread. This critical component ensures your camera is rigidly attached to your optical train, leveraging the M54 standard to maintain a wide, clear aperture and prevent vignetting with larger sensors.\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 M54 Connection for Baader Wide T-Rings\u003c\/h3\u003e\n\u003cp\u003eModern flatteners, reducers, and focusers often terminate in an M54 thread to support full-frame imaging. This adapter seamlessly bridges the gap between these M54 components and Baader's S52 system used on their Wide T-Rings, creating a single, solid unit from your camera to your telescope.\u003c\/p\u003e\n\u003cp\u003eBy replacing push-fit or narrower adapters, the M54i to S52a maintains the largest possible internal diameter through the connection. This is essential for preventing the corners of your images from darkening, a common issue when adapting cameras with APS-C or larger sensors through a restrictive T-minus connection.\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 M54i to S52a Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary function is to connect a camera equipped with a \u003cstrong\u003eBaader Wide T-Ring (which uses an S52 dovetail)\u003c\/strong\u003e to a telescope accessory, such as a field flattener or focuser, that has a male \u003cstrong\u003eM54 thread\u003c\/strong\u003e. This creates a secure, wide-aperture connection ideal for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the M54i to S52a Adapter work with a standard M42 T-ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this adapter is specifically designed for the Baader ecosystem. It connects to the \u003cstrong\u003eS52 dovetail thread\u003c\/strong\u003e found only on Baader's Wide T-Rings. It will not work with standard M42 or M48 T-rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the M54i to S52a Adapter help reduce vignetting?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter is designed to have a clear aperture as wide as the M54 and S52 standards allow. By avoiding the smaller M42 \"T-thread\" bottleneck, it ensures that the light cone from the telescope is not clipped before it reaches the camera sensor, which is critical for illuminating the corners of large sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a corrector with an M54 thread and a DSLR with a Baader Wide-T-Ring. Is the M54i to S52a the adapter I need?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is the exact component required for that setup. It will allow you to securely screw your Baader Wide T-Ring directly onto the M54 threads of your corrector, providing a rigid and properly illuminated imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the M54i to S52a Adapter add significant length to the optical path?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile any adapter adds some optical length, the Baader M54i to S52a is designed to be as low-profile as possible. Its exact optical length is minimal, ensuring it can be integrated into most imaging trains without consuming excessive back focus. You must still account for its length when calculating your total back focus distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I use the M54i to S52a Adapter instead of a generic M54 to M48 adapter for my camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf you are using a Baader Wide T-Ring, this adapter provides a direct S52 connection that is wider and more secure than stepping down to M48 and then to your camera. The Baader system is designed to work together to maximize clear aperture; using this specific adapter maintains that design integrity and provides a more robust, tilt-free connection.\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\u003e0.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter \/ Clear Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e48 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e59 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Adapter\u003c\/td\u003e\n\u003ctd\u003eReducing Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eS52\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdapters Family\u003c\/td\u003e\n\u003ctd\u003eM54 System\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\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":52913169891613,"sku":"BAA-2958754","price":53.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-Adapter-M54i-to-S52a-for-Wide-T-Rings-1_4b724790-eeae-41ad-a956-dd26a695a108.jpg?v=1789087039","url":"https:\/\/davidastro.com\/products\/baader-planetarium-adapter-m54i-to-s52a-for-wide-t-rings","provider":"David Astro","version":"1.0","type":"link"}