{"product_id":"baader-planetarium-m54-heavy-duty-quick-change-system-changer-and-change-ring","title":"Baader Planetarium M54 Heavy-Duty Quick Change System – Changer and change ring","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables rapid changes of heavy cameras and accessories\u003c\/li\u003e\n\u003cli\u003eRotation-proof dovetail connection maintains alignment\u003c\/li\u003e\n\u003cli\u003eAdds only 15mm of optical length to the imaging train\u003c\/li\u003e\n\u003cli\u003eDesigned for the M54 threaded accessory system\u003c\/li\u003e\n\u003cli\u003eConsists of changer (#2958760) and change-ring (#2958765)\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\u003eM54 Heavy-Duty Quick Change System – Changer and change ring\u003c\/h2\u003e\n\u003cp\u003eThe Baader M54 Heavy-Duty Quick Change System, composed of the #2958760 changer and #2958765 change-ring, provides a secure, repeatable connection for heavy imaging trains while adding only 15mm of optical length. It replaces insecure threaded connections with a robust dovetail lock, allowing you to swap cameras, filter wheels, or eyepiece clamps in seconds without losing polar alignment or guide star calibration.\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 #2958760 \u0026amp; #2958765 System: Rotation-Proof Security\u003c\/h3\u003e\n\u003cp\u003eThis system uses a robust dovetail mechanism to lock heavy accessories into place without flexure or rotation. Unlike standard M54 threads that can loosen or misalign as you rotate your camera, this quick-change system ensures your imaging train returns to the exact same position every time, maintaining critical collimation and framing.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy Payload Capacity:\u003c\/strong\u003e Engineered to securely hold and precisely align heavy cameras, filter wheels, and other accessories without sag or tilt.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotation-Proof Connection:\u003c\/strong\u003e The dovetail lock prevents any rotational movement, which is critical for maintaining consistent flat-frame calibration and guide star positions between sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRepeatable Alignment:\u003c\/strong\u003e Swap components in seconds with confidence that your optical alignment and camera angle remain unchanged.\u003c\/li\u003e\n\u003c\/ul\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 Minimal 15mm Optical Length for M54 Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eConsuming only 15mm of back focus, the M54 Quick Change System is designed for complex imaging trains where every millimeter is critical. While any addition to the optical path requires careful planning, the system's 15mm length is a deliberate compromise for the immense security and convenience it offers, allowing you to insert it between correctors and cameras without consuming your entire back focus budget.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e15mm Optical Length:\u003c\/strong\u003e A slim profile that preserves precious back focus for other essential accessories like off-axis guiders or filter drawers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM54 System Integration:\u003c\/strong\u003e Native M54 threads ensure a direct, secure fit into a wide range of focusers, correctors, and other Baader Planetarium accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStreamlined Workflow:\u003c\/strong\u003e Enables rapid changes between different imaging configurations—for example, switching from a monochrome camera with a filter wheel to a one-shot-color camera—without disassembling the entire optical 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\"\u003eWhat is the main advantage of the M54 Heavy-Duty Quick Change System over just using threads?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is \u003cstrong\u003esecurity and repeatability\u003c\/strong\u003e. Standard threads can loosen, causing camera rotation and tilt, which ruins calibration frames. The M54 Quick Change System uses a dovetail lock that is rotation-proof and returns your equipment to the exact same position every time you attach it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much back focus does the M54 Heavy-Duty Quick Change System use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe system has a total optical length of \u003cstrong\u003e15mm\u003c\/strong\u003e. This is the amount of back focus it will consume in your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the M54 Heavy-Duty Quick Change System strong enough for a heavy camera and filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. It is specifically designed as a \"Heavy-Duty\" system to carry heavy imaging loads with maximum safety. The dovetail mechanism provides a much more secure connection than simple threads, preventing flexure even with substantial payloads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this M54 Quick Change System cause vignetting with a full-frame sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe M54 thread standard (54mm diameter) is designed to provide a large, clear aperture suitable for full-frame sensors and larger. When used within a full M54 optical train, this quick-change system should not introduce any additional vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I add the M54 Quick Change System to my imaging train with a 55mm back focus requirement, how much space is left?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAfter installing the 15mm quick change system, you would have \u003cstrong\u003e40mm\u003c\/strong\u003e of remaining back focus (55mm - 15mm = 40mm). This is typically sufficient space for an off-axis guider and any necessary extension rings to achieve perfect focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the M54 Quick Change System to quickly switch between cameras on my SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This is an ideal use case. You can attach one change-ring to your deep-sky camera and another (sold separately) to a planetary camera. This would allow you to switch between them on your Schmidt-Cassegrain Telescope in seconds without having to unthread anything in the dark.\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\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e15mm\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\u003eScrew Type\u003c\/td\u003e\n\u003ctd\u003eLarge clamping screw with brass thrust piece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping System\u003c\/td\u003e\n\u003ctd\u003eDovetail clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter \/ Clear Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e65 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Adapter\u003c\/td\u003e\n\u003ctd\u003eSame-Thread Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eS54\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":52913163665693,"sku":"BAA-2958766","price":222.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-M54-Heavy-Duty-Quick-Change-System-Changer-and-change-ring-1_b690e62f-3c6b-4d66-8c77-9429562cf49a.jpg?v=1789086969","url":"https:\/\/davidastro.com\/fr\/products\/baader-planetarium-m54-heavy-duty-quick-change-system-changer-and-change-ring","provider":"David Astro","version":"1.0","type":"link"}