{"product_id":"svbony-sa404-m48-female-to-m42-male-telescope-adapter","title":"SVBONY SA404 M48 Female to M42 Male Telescope Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M42 (T2) accessories to M48 (2\") threaded components\u003c\/li\u003e\n\u003cli\u003eMachined from aluminum alloy to a 0.1mm accuracy\u003c\/li\u003e\n\u003cli\u003eAdds a precise 31.5mm of height to the optical path\u003c\/li\u003e\n\u003cli\u003eLightweight 70g design minimizes load on the focuser\u003c\/li\u003e\n\u003cli\u003eStandard M48x0.75 female and M42 male threads\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\u003eSVBONY SA404 M48 to M42 Telescope Adapter\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SA404 M48 to M42 Telescope Adapter provides the essential conversion from a female M48x0.75 thread to a male M42 thread, adding a precise height of 31.5mm to your imaging train. Machined from a solid block of aluminum alloy to an accuracy of 0.1mm and weighing only 70g, the SA404 ensures a rigid, flex-free link between your telescope's corrector and your camera's T-ring.\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\u003e0.1mm Machining Accuracy for a Stable Imaging Train\u003c\/h3\u003e\n\u003cp\u003eIn astrophotography, any tilt or flexure in the optical train can ruin an image by elongating stars. The SA404 is machined to a 0.1mm tolerance to guarantee that your camera sensor remains perfectly parallel to the focal plane. This precision eliminates a common source of image degradation, ensuring round stars across the entire field.\u003c\/p\u003e\n\u003cp\u003eConstructed from black anodized aluminum alloy, the adapter weighs a mere 70g, adding minimal load to your focuser assembly. Its fixed 31.5mm height is a known value that must be factored into your back focus calculations, providing a solid, non-flexing extension to achieve the correct spacing for your field flattener or reducer.\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 SVBONY SA404 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SA404 adapter is used to connect accessories with a smaller \u003cstrong\u003eM42 (T2-thread)\u003c\/strong\u003e to components that use a larger \u003cstrong\u003eM48 (2-inch filter thread)\u003c\/strong\u003e. It is commonly used to attach a DSLR camera with an M42 T-ring or a guide camera to a field flattener, reducer, or off-axis guider that has an M48 output thread.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 0.1mm accuracy of the SA404 benefit my astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e0.1mm machining accuracy\u003c\/strong\u003e ensures that the adapter's threads and faces are perfectly square. This prevents tilt in the imaging train, which is critical for achieving sharp, round stars across the entire sensor, especially with fast optical systems or large-format cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SVBONY SA404 add significant weight to my setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The adapter is made from lightweight aluminum alloy and has a net weight of only \u003cstrong\u003e70g\u003c\/strong\u003e. This minimal weight ensures it will not strain your telescope's focuser or cause issues with balance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a field flattener with M48 threads and a DSLR with an M42 T-ring. Will the SA404 connect them?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a perfect use case for the SVBONY SA404. It will thread directly onto the M48 female threads of your flattener, and your M42 T-ring will then thread onto the SA404's male threads. Just be sure that the adapter's \u003cstrong\u003e31.5mm height\u003c\/strong\u003e works with your required back focus distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen imaging the Orion Nebula (M42) with my refractor, why is a secure adapter like the SA404 important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eImaging a bright target like the Orion Nebula (M42) often involves many long exposures. A secure, precisely machined adapter like the SVBONY SA404 prevents any microscopic shift or tilt between sub-exposures. This mechanical stability is crucial for stacking sharp, high-resolution final images without introducing artifacts from equipment flexure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the exact thread specifications for the SVBONY SA404?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SA404 features a \u003cstrong\u003efemale M48x0.75 thread\u003c\/strong\u003e on the telescope side and a \u003cstrong\u003emale M42x0.75 thread\u003c\/strong\u003e on the camera\/accessory side. This is the standard for 2-inch filters and T-rings, respectively.\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\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-Side Interface\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Female Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory-Side Interface\u003c\/td\u003e\n\u003ctd\u003eM42 Male Thread \/ 1.25 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMachining Accuracy\u003c\/td\u003e\n\u003ctd\u003e0.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Path Height\u003c\/td\u003e\n\u003ctd\u003e31.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e54mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e70g\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\"\u003eSA404 M48 to M42 Adapter\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 does not require software, drivers, or a manual for operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861284679965,"sku":"SV-W9165A","price":11.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SA404-M48-to-M42-Telescope-Adapter-for-Astrophotography-Camera-1_b43c0cec-e125-42ac-af0b-9d64afe613f3.jpg?v=1788661299","url":"https:\/\/davidastro.com\/fr-us\/products\/svbony-sa404-m48-female-to-m42-male-telescope-adapter","provider":"David Astro","version":"1.0","type":"link"}