{"product_id":"baader-planetarium-adapter-m68a-to-m54a","title":"Baader Planetarium Adapter M68a to M54a","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M68 Male Threads to M54 Male Threads\u003c\/li\u003e\n\u003cli\u003eFunctions as a Reducer for Optical Trains\u003c\/li\u003e\n\u003cli\u003ePrecision-Machined for Secure, No-Flexure Connections\u003c\/li\u003e\n\u003cli\u003eBlack Anodized to Minimize Internal Reflections\u003c\/li\u003e\n\u003cli\u003eMaintains Optical Alignment Between Components\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\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 M68a to M54a\u003c\/h2\u003e\n      \u003cp\u003eThe Baader Adapter M68a to M54a provides a critical, precision-machined link for astrophotography setups, enabling you to connect components with M68 external threads to devices requiring an M54 external thread. This adapter functions as a reducer, stepping down the larger M68 standard often found on high-end focusers and correctors to the widely used M54 thread common on filter wheels and cameras. It ensures a rigid, perfectly aligned connection in your imaging train.\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\u003eBridging M68 and M54 Thread Standards\u003c\/h3\u003e\n      \u003cp\u003eThis adapter is the solution for integrating hardware from different manufacturers or product lines. By converting an M68 male thread (M68a) to an M54 male thread (M54a), you can securely attach M54-threaded accessories directly to an M68-compatible focuser, field flattener, or off-axis guider. Its primary function is to create a solid, non-flexing joint that preserves the optical alignment crucial for sharp, round stars across the field.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSecure Connection:\u003c\/strong\u003e Machined from high-grade aluminum, this adapter prevents the flexure and tilt that can ruin long exposures, a common problem with less precise solutions.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eInternal Baffling:\u003c\/strong\u003e The interior is blackened and baffled to absorb stray light, preventing internal reflections from reducing contrast in your final images.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLow Profile Design:\u003c\/strong\u003e Engineered to add minimal optical length, it helps you maintain precious back focus distance when assembling complex imaging trains.\u003c\/li\u003e\n      \u003c\/ul\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 primary use for the Adapter M68a to M54a?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary use for the \u003cstrong\u003eAdapter M68a to M54a\u003c\/strong\u003e is to connect a component with an M68 male thread, such as a large focuser or coma corrector, to an accessory that has an M54 female thread, like a filter wheel or camera-specific adapter. It \"reduces\" the thread size while maintaining a secure connection.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the 'a' suffixes in M68a and M54a mean?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIn the Baader Planetarium system, the 'a' suffix typically denotes an \u003cstrong\u003eexternal (male) thread\u003c\/strong\u003e. Therefore, this adapter has an M68 male thread on one side and an M54 male thread on the other. You would thread it into a component with female M68 threads and attach a component with female M54 threads to the other side.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the M68a to M54a adapter introduce vignetting in my imaging setup?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhether this adapter causes vignetting depends on your telescope's focal ratio and sensor size. While stepping down from a larger M68 opening to a smaller M54 one can potentially vignette large full-frame sensors on very fast optical systems (e.g., f\/4 or faster), it is generally not an issue for APS-C or smaller sensors. The M54 standard is designed to fully illuminate sensors up to the APS-C format.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if I need this specific M68a to M54a adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou need this adapter if your imaging train ends with a component that has M68 female threads (like a Baader MPCC III Coma Corrector) and the next device you want to attach (like a ZWO filter wheel) has M54 female threads. This adapter bridges that specific gap. Always measure the threads on your components if you are unsure.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the optical length of the Adapter M68a to M54a specified?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe manufacturer does not specify the exact optical length. These types of adapters are designed to be as thin as possible to consume minimal back focus. For critical back focus calculations, it is recommended that you measure the adapter's physical thickness with calipers upon receipt.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the M68a to M54a adapter for visual observing?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile primarily designed for astrophotography trains, this adapter can be used in visual setups if you need to solve a specific threading problem, such as attaching an M54-threaded accessory to a focuser drawtube with M68 threads. However, for most visual applications, a standard 2\" barrel connection is more common.\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\u003eInput Thread\u003c\/td\u003e\n\u003ctd\u003eM68 Male (M68a)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Thread\u003c\/td\u003e\n\u003ctd\u003eM54 Male (M54a)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eReducer Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eBlack Anodized Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.03\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium, Zeiss\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter \/ Clear Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e76\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\u003e5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM68 x 1\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\"\u003eAdapter M68a to M54a\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\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":52913174806813,"sku":"BAA-2458230","price":78.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-Adapter-M68a-to-M54a-1_63047eb3-07a1-4c61-ab1b-919d910dc170.jpg?v=1789087197","url":"https:\/\/davidastro.com\/products\/baader-planetarium-adapter-m68a-to-m54a","provider":"David Astro","version":"1.0","type":"link"}