{"product_id":"starizona-nexus-threaded-focuser-adapter","title":"Starizona Nexus Threaded Focuser Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables a direct threaded connection to a focuser\u003c\/li\u003e\n\u003cli\u003eReplaces the removable lip on the Nexus 0.75x Coma Corrector\u003c\/li\u003e\n\u003cli\u003eImproves imaging train rigidity and alignment\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple thread sizes for various focusers\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\u003eNexus Threaded Focuser Adapter\u003c\/h2\u003e\n\u003cp\u003eThe Nexus Threaded Focuser Adapter is designed to replace the standard removable lip on the Starizona Nexus 0.75x coma corrector, enabling a solid, threaded connection directly to your focuser. With versions available for threads like M54 x 1, M56, and M58 x 0.75, this adapter bypasses compression rings to create a rigid, tilt-free imaging train essential for sharp, round stars across the entire frame.\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\u003eAdapting the Nexus 0.75x for Direct Focuser Threading\u003c\/h3\u003e\n\u003cp\u003eThis adapter creates a male thread on the Nexus 0.75x coma corrector, allowing it to be screwed directly into the drawtube of a compatible focuser. By creating a solid metal-on-metal connection, you eliminate the primary sources of tilt and flexure in an imaging train: eyepiece holders that rely on compression rings or set screws. This ensures the coma corrector and camera sensor remain perfectly orthogonal to the optical axis, a critical factor for achieving a flat field with pinpoint stars from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\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 purpose of the Nexus Threaded Focuser Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts sole purpose is to create a rigid, secure, threaded connection between a Starizona Nexus 0.75x coma corrector and a focuser. This replaces the less stable connection of a standard 2\" nosepiece held by a compression ring, which can introduce tilt into the imaging system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose the correct Nexus adapter for my focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must identify the specific female thread size on your telescope's focuser drawtube. Match that thread to one of the available adapter options, such as M54 x 1, M56, or M58 x 0.75, to ensure a direct fit. For example, the Quattro adapter is made for the male M54.5 x 1 thread on Skywatcher Quattro Newtonian focusers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a threaded connection better than a 2-inch nosepiece for the Nexus 0.75x corrector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA threaded connection provides superior mechanical stability. It prevents the coma corrector from shifting or tilting as the telescope moves, which is a common problem with adapters held in place by a single set screw or a compression ring. For astrophotography, this rigidity is key to maintaining sharp focus and round stars across your entire image sensor.\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\u003eAvailable Options\u003c\/td\u003e\n\u003ctd\u003eQuattro, M54 x 0.75, M54 x 1, M56 (GSO\/CarbonStar), M57 x 0.75, M58 x 0.75 (Askar N-Series)\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\"\u003eNexus Threaded Focuser 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\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starizona-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarizona Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starizona","offers":[{"title":"Quattro","offer_id":68033922826525,"sku":"STZ-TFA-NEX-QTR","price":56.0,"currency_code":"CAD","in_stock":true},{"title":"M54 x 0.75","offer_id":68033922859293,"sku":"STZ-TFA-NEX-M54M75","price":56.0,"currency_code":"CAD","in_stock":true},{"title":"M54 x 1","offer_id":68033922892061,"sku":"STZ-TFA-NEX-M54M","price":56.0,"currency_code":"CAD","in_stock":true},{"title":"M56 (GSO\/CarbonStar)","offer_id":68033922924829,"sku":"STZ-TFA-NEX-M56F75","price":56.0,"currency_code":"CAD","in_stock":true},{"title":"M57 x 0.75","offer_id":68033922957597,"sku":"STZ-TFA-NEX-M57M75","price":56.0,"currency_code":"CAD","in_stock":true},{"title":"M58 x 0.75 (Askar N-Series)","offer_id":68033922990365,"sku":"STZ-TFA-NEX-M58F75","price":56.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starizona-Nexus-Quattro-Threaded-Focuser-Adapter-1_795be118-fe01-4e4a-9a47-f64c17318d4d.jpg?v=1794375584","url":"https:\/\/davidastro.com\/products\/starizona-nexus-threaded-focuser-adapter","provider":"David Astro","version":"1.0","type":"link"}