{"product_id":"starizona-threaded-focuser-adapter","title":"Starizona Threaded Focuser Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSolid, threaded connection eliminates tilt and sag\u003c\/li\u003e\n\u003cli\u003eAvailable for dozens of focuser thread standards\u003c\/li\u003e\n\u003cli\u003eChoice of M42 or M48 camera-side threads\u003c\/li\u003e\n\u003cli\u003ePrecision-machined for perfect optical alignment\u003c\/li\u003e\n\u003cli\u003eIncludes spacers for fine-tuning backfocus\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\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\u003eStarizona Threaded Focuser Adapter\u003c\/h2\u003e\n\u003cp\u003eThe Starizona Threaded Focuser Adapter provides a secure, all-threaded connection between your telescope's focuser and your M42 or M48 imaging train. With dozens of available models, it supports a vast range of focuser threads from M54 up to M102 and even 2.7\" Astro-Physics standards, replacing unstable compression rings with a rigid, tilt-free interface.\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 Threaded Adaptation from M54 to M102 Focusers\u003c\/h3\u003e\n\u003cp\u003eThis adapter is the critical first link in a solid imaging train. By threading directly onto your focuser's drawtube, it eliminates the flexure, sag, and tilt common with slip-fit or compression-ring adapters. The result is a perfectly co-linear optical axis, which is essential for achieving sharp, round stars from edge to edge.\u003c\/p\u003e\n\u003cp\u003eStarizona offers versions to fit a huge variety of modern and classic focusers, including those from Takahashi (M72), Explore Scientific (M68 and M88), Astro-Physics (2.7\"), FeatherTouch (M75), and many others. This ensures you can create a robust mechanical connection regardless of your telescope brand, locking your reducer, flattener, or camera directly to the focuser.\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\u003eStandardized M42 and M48 Camera-Side Connections\u003c\/h3\u003e\n\u003cp\u003eOn the camera side, you can choose between the two most common imaging standards: M42x0.75 (T-thread) and M48x0.75 (2\" filter thread). M42 offers maximum compatibility with legacy accessories and smaller sensors, while M48 provides a wider, unvignetted light path for full-frame and large APS-C sensors.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackfocus Management:\u003c\/strong\u003e These adapters consume a small amount of backfocus. Each adapter includes spacers to help you precisely dial in the correct distance to your sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM42 vs. M48 Path Length:\u003c\/strong\u003e Note that the M42 and M48 versions consume different amounts of backfocus, a critical detail to account for when planning your optical train.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhy use a Starizona Threaded Focuser Adapter instead of a 2\" nosepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA threaded adapter creates a rigid, secure connection that prevents tilt and sag. A 2\" nosepiece held by a thumbscrew or compression ring can easily shift as the telescope slews, throwing off collimation and resulting in elongated stars. For imaging, a fully threaded connection like the Starizona adapter is always the superior choice for maintaining perfect optical alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich camera thread should I choose for my Starizona adapter, M42 or M48?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe choice depends on your camera's sensor size and your other accessories.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM42 (T-thread):\u003c\/strong\u003e Best for cameras with smaller sensors (like the ASI533MC) or if your existing spacers and filter wheels are all M42.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM48 (2\" Filter Thread):\u003c\/strong\u003e Recommended for cameras with APS-C or full-frame sensors (like the ASI2600MC or ASI6200MM) to prevent vignetting, which is the darkening of the corners of your image.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know which Starizona adapter fits my telescope focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need to know the specific thread size and gender (male or female) on your focuser's drawtube. This is often listed in your telescope's manual or on the manufacturer's website. For example, many Takahashi focusers use an M72 female thread, while some Explore Scientific focusers use an M68 female thread. Carefully measure or verify your focuser's thread before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo the Starizona Threaded Focuser Adapters affect my backfocus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, all adapters consume some amount of backfocus. The exact amount is different for the M42 and M48 versions of the adapter. Starizona includes spacers with each adapter to give you more flexibility in achieving the precise spacing required by your flattener or reducer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a Takahashi with an M72 thread and want to connect a full-frame camera. Which Starizona adapter is best?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor that setup, you would select the Starizona adapter with \"M72 x 1mm Female (Takahashi)\" threads on the focuser side. Because you are using a full-frame camera, you should choose the M48 version for the camera side to minimize vignetting and ensure your sensor is fully illuminated.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this Starizona adapter help build a rigid imaging train on my Explore Scientific refractor with a 2.5\" Hex focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 2.5\" Hex focuser typically has M68 x 0.75mm female threads. By selecting the corresponding Starizona adapter, you can thread your entire imaging train—reducer, filter wheel, and camera—directly onto the focuser drawtube. This creates a single solid unit, preventing any part of your camera setup from flexing or tilting as the telescope moves across the sky.\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\u003eM54 x 1mm Male (2-Part) \/ M42, M54 x 1mm Male (2-Part) \/ M48, M56 x 1mm Female (Esatto 2\") \/ M48, M58 x 1mm Female \/ M48, M63 x 1mm Male \/ M42, M63 x 1mm Male \/ M48, M65 x 1mm Female \/ M48, M68 x 1mm Male \/ M42, M68 x 1mm Male \/ M48, M68 x 0.75mm Female (Explore Scientific) \/ M42, M68 x 0.75mm Female (Explore Scientific) \/ M48, M72 x 1mm Female (Takahashi) \/ M42, M72 x 1mm Female (Takahashi) \/ M48, M74 x 1mm Female (Esprit) \/ M42, M74 x 1mm Female (Esprit) \/ M48, M74 x 1mm Male \/ M42, M74 x 1mm Male \/ M48, M75 x 1mm Male (3\" FeatherTouch) \/ M42, M75 x 1mm Male (3\" FeatherTouch) \/ M48, M81 x 1mm Female (Esatto 2\") \/ M48, M82 x 1mm Female \/ M42, M82 x 1mm Female \/ M48, M82 x 1.25mm Male (Exp. Sci. Self-Center, ES-FOCS3) \/ M48, M84 x 1mm Female (Askar 103\/120) \/ M42, M84 x 1mm Female (Askar 103\/120) \/ M48, M86 x 1mm Female \/ M42, M86 x 1mm Female \/ M48, M88 x 1mm Male (Explore Scientific 3\") \/ M42, M88 x 1mm Male (Explore Scientific 3\") \/ M48, M92 x 1mm Female (Askar 140\/185) \/ M42, M92 x 1mm Female (Askar 140\/185) \/ M48, M102 x 1mm Male (iStar\/Airy-Disk 140) \/ M42, M102 x 1mm Male (iStar\/Airy-Disk 140) \/ M48, 2.7\" x 24tpi Male (Astro-Physics) \/ M42, 2.7\" x 24tpi Male (Astro-Physics) \/ M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\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":"M54 x 1mm Male (2-Part) \/ M42","offer_id":68033924235549,"sku":"STZ-TFA-M54M-M42M","price":69.95,"currency_code":"USD","in_stock":true},{"title":"M54 x 1mm Male (2-Part) \/ M48","offer_id":68033924268317,"sku":"STZ-TFA-M54M-M48M","price":69.95,"currency_code":"USD","in_stock":true},{"title":"M56 x 1mm Female (Esatto 2\") \/ M48","offer_id":68033924301085,"sku":"STZ-TFA-M56F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M58 x 1mm Female \/ M48","offer_id":68033924333853,"sku":"STZ-TFA-M58F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M63 x 1mm Male \/ M42","offer_id":68033924366621,"sku":"STZ-TFA-M63M-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M63 x 1mm Male \/ M48","offer_id":68033924399389,"sku":"STZ-TFA-M63M-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M65 x 1mm Female \/ M48","offer_id":68033924432157,"sku":"STZ-TFA-M65F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M68 x 1mm Male \/ M42","offer_id":68033924464925,"sku":"STZ-TFA-M68M-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M68 x 1mm Male \/ M48","offer_id":68033924497693,"sku":"STZ-TFA-M68M-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M68 x 0.75mm Female (Explore Scientific) \/ M42","offer_id":68033924530461,"sku":"STZ-TFA-M68F75-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M68 x 0.75mm Female (Explore Scientific) \/ M48","offer_id":68033924563229,"sku":"STZ-TFA-M68F75-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M72 x 1mm Female (Takahashi) \/ M42","offer_id":68033924595997,"sku":"STZ-TFA-M72F-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M72 x 1mm Female (Takahashi) \/ M48","offer_id":68033924628765,"sku":"STZ-TFA-M72F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M74 x 1mm Female (Espirit) \/ M42","offer_id":68033924661533,"sku":"STZ-TFA-M74F-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M74 x 1mm Female (Espirit) \/ M48","offer_id":68033924694301,"sku":"STZ-TFA-M74F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M74 x 1mm Male \/ M42","offer_id":68033924727069,"sku":"STZ-TFA-M74M-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M74 x 1mm Male \/ M48","offer_id":68033924759837,"sku":"STZ-TFA-M74M-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M75 x 1mm Male (3\" FeatherTouch) \/ M42","offer_id":68033924792605,"sku":"STZ-TFA-M75M-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M75 x 1mm Male (3\" FeatherTouch) \/ M48","offer_id":68033924825373,"sku":"STZ-TFA-M75M-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M81 x 1mm Female (Esatto 2\") \/ M48","offer_id":68033924858141,"sku":"STZ-TFA-M81F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M82 x 1mm Female \/ M42","offer_id":68033924890909,"sku":"STZ-TFA-M82F-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M82 x 1mm Female \/ M48","offer_id":68033924923677,"sku":"STZ-TFA-M82F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M82 x 1.25mm Male (Exp. Sci. Self-Center, ES-FOCS3) \/ M48","offer_id":68033924956445,"sku":"STZ-TFA-M82M125-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M84 x 1mm Female (Askar 103\/120) \/ M42","offer_id":68033924989213,"sku":"STZ-TFA-M84F-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M84 x 1mm Female (Askar 103\/120) \/ M48","offer_id":68033925021981,"sku":"STZ-TFA-M84F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M86 x 1mm Female \/ M42","offer_id":68033925054749,"sku":"STZ-TFA-M86F-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M86 x 1mm Female \/ M48","offer_id":68033925087517,"sku":"STZ-TFA-M86F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M88 x 1mm Male (Explore Scientific 3\") \/ M42","offer_id":68033925120285,"sku":"STZ-TFA-M88M-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M88 x 1mm Male (Explore Scientific 3\") \/ M48","offer_id":68033925153053,"sku":"STZ-TFA-M88M-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M92 x 1mm Female (Askar 140\/185) \/ M42","offer_id":68033925185821,"sku":"STZ-TFA-M92F-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M92 x 1mm Female (Askar 140\/185) \/ M48","offer_id":68033925218589,"sku":"STZ-TFA-M92F-M48M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"M102 x 1mm Male (iStar\/Airy-Disk 140) \/ M42","offer_id":68033925251357,"sku":"STZ-TFA-M102M-M42M","price":79.95,"currency_code":"USD","in_stock":true},{"title":"M102 x 1mm Male (iStar\/Airy-Disk 140) \/ M48","offer_id":68033925284125,"sku":"STZ-TFA-M102M-M48M","price":79.95,"currency_code":"USD","in_stock":true},{"title":"2.7\" x 24tpi Male (Astro-Physics) \/ M42","offer_id":68033925316893,"sku":"STZ-TFA-2.7M-M42M","price":49.95,"currency_code":"USD","in_stock":true},{"title":"2.7\" x 24tpi Male (Astro-Physics) \/ M48","offer_id":68033925349661,"sku":"STZ-TFA-2.7M-M48M","price":49.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starizona-Apex-ED-Threaded-Focuser-Adapter-1_23a4eb40-c066-40f7-9a30-b40e4d8103c7.jpg?v=1794375625","url":"https:\/\/davidastro.com\/en-int\/products\/starizona-threaded-focuser-adapter","provider":"David Astro","version":"1.0","type":"link"}