{"product_id":"pegasus-m68-male-to-m48-female","title":"Pegasus M68 Male to M48 Female Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M48 (2-inch filter) accessories to M68 focusers\u003c\/li\u003e\n\u003cli\u003eM68x1 Male Thread\u003c\/li\u003e\n\u003cli\u003eM48x0.75 Female Thread\u003c\/li\u003e\n\u003cli\u003eMaintains a rigid, non-flexing connection\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 M68 Male to M48 Female\u003c\/h2\u003e\n\u003cp\u003eThis Adapter M68 Male to M48 Female provides a simple, secure solution for integrating standard M48x0.75 accessories into an optical train that uses the larger M68 thread standard. By converting the large male M68 thread to a female M48 thread, you can directly attach popular cameras, filter wheels, and off-axis guiders without introducing flexure.\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 Your Imaging Train: Converting M68 Threads to the M48 Standard\u003c\/h3\u003e\n\u003cp\u003eMany high-end focusers and field correctors terminate in a large-aperture M68 thread to prevent vignetting with full-frame sensors. This adapter steps that connection down to the widely used M48 female thread, often called the \"2-inch filter thread,\" which is the standard for a vast range of astrophotography equipment. This single, machined piece ensures a rigid connection that is critical for maintaining optical alignment and preventing tilt, especially with heavier imaging payloads.\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\u003eMaintaining Optical Alignment with a 0.75mm Pitch\u003c\/h3\u003e\n\u003cp\u003eThe adapter features a standard M48 thread pitch of 0.75mm, ensuring full compatibility with accessories from virtually any manufacturer. The precision-cut threads allow for a tight, secure fit that won't loosen during an imaging session. This solid metal-on-metal contact is superior to multi-part adapters or push-fit solutions, which can introduce slight shifts in the optical axis as the telescope tracks across the sky.\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 this Adapter M68 Male to M48 Female?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary function is to connect astrophotography accessories with a male M48 thread (like a camera nosepiece, filter wheel, or off-axis guider) to a telescope focuser or corrector that has a female M68 thread. It allows you to use your standard 2-inch accessories on larger-format optical systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this M68 to M48 adapter work with my specific brand of focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is designed to work with any focuser, corrector, or accessory that utilizes a standard M68 female thread. Likewise, the female side is a standard M48x0.75 thread, which is compatible with the vast majority of astronomy cameras, filter drawers, and other 2-inch barrel accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much length does this Adapter M68 Male to M48 Female add to the optical path?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the exact optical path length is not specified, thread adapters like this are typically designed to be as thin as possible while maintaining structural integrity. You should assume it adds a few millimeters to your back focus distance. Always measure your final imaging train to ensure you are within the correct back focus tolerance for your flattener or reducer.\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 M48 Female to attach my DSLR camera to a refractor with an M68 focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. If your DSLR camera has a standard M48 T-ring, you can thread the T-ring directly into the female M48 side of this adapter. This will allow you to securely attach your camera to the M68 focuser drawtube, providing a much more rigid connection than a standard 2-inch push-fit adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the thread pitch on this adapter standard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the female side uses an M48x0.75 thread. The 0.75mm pitch is the industry standard for 2-inch astronomy filters and accessories, ensuring wide compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have an off-axis guider with male M48 threads. Can I connect it to my Takahashi telescope's M68 corrector using this adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This is a perfect use case. You would thread the M68 male side of the adapter into your telescope's corrector, and then thread your M48 off-axis guider into the female M48 side of the adapter. This creates a secure, all-threaded connection for your entire imaging train.\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\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM48 Thread Pitch\u003c\/td\u003e\n\u003ctd\u003e0.75mm\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 M48 Female\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\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":49171437388061,"sku":"PEG-ADAPT-M68M-M48F","price":27.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PEG-ADAPT-M68M-M48F.jpg?v=1726595717","url":"https:\/\/davidastro.com\/fr-us\/products\/pegasus-m68-male-to-m48-female","provider":"David Astro","version":"1.0","type":"link"}