{"product_id":"pegasus-m68-male-to-m54-male","title":"Pegasus M68 Male to M54 Male Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M68x1.0 accessories to M54x0.75 components\u003c\/li\u003e\n\u003cli\u003eMale-to-male thread design for direct coupling\u003c\/li\u003e\n\u003cli\u003e4mm thread length on both M68 and M54 sides\u003c\/li\u003e\n\u003cli\u003eInternal M48x0.75 threads for standard 2-inch filters\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\u003eAdapter M68 Male to M54 Male\u003c\/h2\u003e\n\u003cp\u003eThis precision-machined Adapter M68 Male to M54 Male solves critical spacing and connection challenges in complex imaging trains. It directly converts the larger M68x1.0mm thread standard to the common M54x0.75mm pitch with a 4mm thread length on each side. The adapter also features an internal M48x0.75mm thread, allowing you to place standard 2-inch filters directly within the optical path.\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\u003eM68 to M54 Conversion: 1.0mm and 0.75mm Pitch Standards\u003c\/h3\u003e\n\u003cp\u003eThe primary function of this adapter is to bridge two different large-format thread sizes common in high-end imaging. The male M68 side features a 1.0mm pitch and 4mm of thread length, ideal for connecting to large correctors or flatteners. The male M54 side uses the standard 0.75mm pitch over a 4mm length, ensuring a secure fit with popular filter wheels, off-axis guiders, and camera rotators.\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 M48 Filter Path: A 2-inch Filter-Ready Core\u003c\/h3\u003e\n\u003cp\u003eA key feature is the internal M48x0.75mm threaded bore, which passes through the adapter. This allows you to install a standard 2-inch astronomy filter inside the adapter itself, saving space and potentially reducing back focus requirements compared to a separate filter drawer. This is particularly useful for one-shot color cameras or when a single filter is used for an entire session.\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 use for the Adapter M68 Male to M54 Male?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is designed to connect a component with a female M68x1.0 port, like a large format field flattener or reducer, to an accessory with a female M54x0.75 port, such as a filter wheel or an off-axis guider. The internal M48 thread also allows for the integration of a 2-inch filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Adapter M68 Male to M54 Male to install filters with my full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the internal M48x0.75mm threads are the standard for 2-inch mounted astronomy filters. This allows you to place a filter within the adapter, which is an efficient way to add filtration to an imaging train that terminates in a full-frame camera attached via M54 connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter cause vignetting with my large sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the M68 and M54 openings are designed for large sensors, using the internal M48 filter thread can introduce vignetting on sensors larger than the APS-C format, especially with fast optical systems. The clear aperture is defined by the M48 thread, so it's best suited for full-frame sensors when used without a filter installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the optical length of the Adapter M68 Male to M54 Male?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe specifications do not list the optical length. The adapter's contribution to back focus will be its overall physical length minus the length of the male threads that recess into the connecting components. This must be measured for precise back focus calculations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach this adapter between my Riccardi Reducer and ZWO filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf your Riccardi reducer has a female M68x1.0 output and your ZWO filter wheel has a female M54x0.75 input, this adapter will work perfectly. You would thread the M68 male side into the reducer and the M54 male side into the filter wheel to create a solid, direct connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the pitch on the M54 side of the Adapter M68 Male to M54 Male compatible with M54 camera adapters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the M54 thread has a pitch of 0.75mm, which is the industry standard for most M54-threaded astronomy accessories, including filter wheels, off-axis guiders, and camera-specific T-rings. This ensures wide compatibility.\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\u003eM68 Thread\u003c\/td\u003e\n\u003ctd\u003eMale, Pitch 1.0mm, 4mm length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM54 Thread\u003c\/td\u003e\n\u003ctd\u003eMale, Pitch 0.75mm, 4mm length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Thread\u003c\/td\u003e\n\u003ctd\u003eM48 x 0.75mm (for 2\" filters)\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\"\u003eAdapter M68 Male to M54 Male\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\u003cli\u003e\n\u003cp\u003eNo downloads are available for this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis product is covered by a 1-year manufacturer's warranty against defects in materials and workmanship.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pegasus Astro","offers":[{"title":"Default Title","offer_id":49171383320861,"sku":"PEG-ADAPT-M68M-M54M","price":27.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PEG-ADAPT-M68M-M54M.jpg?v=1726594905","url":"https:\/\/davidastro.com\/fr-us\/products\/pegasus-m68-male-to-m54-male","provider":"David Astro","version":"1.0","type":"link"}