{"product_id":"svbony-telescope-focuser-adapter-m42x0-75-for-reflectors-125in","title":"SVBONY Telescope Focuser Adapter M42x0.75 for Reflectors - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts M42x0.75 male threads to accept 1.25\" eyepieces and accessories\u003c\/li\u003e\n\u003cli\u003eProvides 37mm to 47mm of adjustable focus distance\u003c\/li\u003e\n\u003cli\u003eThree locking thumbscrews ensure a secure, centered grip\u003c\/li\u003e\n\u003cli\u003eDurable, all-metal anodized aluminum construction\u003c\/li\u003e\n\u003cli\u003eWeighs only 70g (2.46oz)\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\u003eSVBONY 1.25\" Telescope Focuser Adapter M42x0.75 for Reflector\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY 1.25\" Telescope Focuser Adapter adds a critical 10mm of fine-focus travel to any reflector telescope with an M42x0.75 threaded focuser. This all-metal, 70g adapter allows you to precisely adjust focus from a minimum of 37mm to a maximum of 47mm, perfect for achieving sharp focus with cameras or non-parfocal eyepieces. Three locking screws provide a secure, non-slip grip on any 1.25\" accessory, ensuring perfect alignment and stability throughout your observing session.\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\u003eAdjustable Focus: 10mm of Travel from 37mm to 47mm\u003c\/h3\u003e\n\u003cp\u003eThis adapter's primary function is to provide an additional layer of focus control. The helical focusing mechanism gives you a 10mm range of adjustment, variable between 37mm and 47mm of extension. This is invaluable for fine-tuning focus on planetary cameras without touching the telescope's main focuser, or for bringing different eyepieces to a sharp image without constantly racking the focuser in and out.\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 3-Screw Grip for 1.25\" Accessories\u003c\/h3\u003e\n\u003cp\u003eUnlike simple adapters with a single set screw, the SVBONY M42 Focuser Adapter uses three thumbscrews to hold your 1.25\" accessories. This three-point contact system ensures your eyepiece or camera is perfectly centered in the optical path and held firmly without any wobble or tilt. The durable, anodized all-metal construction guarantees longevity and resists wear from repeated use.\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\u003eSVBONY M42 Adapter vs. Fixed Adapters: The 10mm Advantage\u003c\/h3\u003e\n\u003cp\u003eStandard M42 to 1.25\" adapters offer a fixed optical length, which can prevent you from reaching focus with certain accessory combinations. The SVBONY adapter solves this problem by giving you 10mm of travel to work with. This flexibility can be the difference between a sharp, focused image and one that's just out of reach, making it a superior choice for imagers and visual observers who frequently swap equipment.\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 main benefit of the SVBONY M42 Focuser Adapter's adjustable length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main benefit is gaining an extra \u003cstrong\u003e10mm of fine focus travel\u003c\/strong\u003e (from 37mm to 47mm). This allows you to achieve critical focus with astrophotography cameras or bring non-parfocal eyepieces into focus without needing to make large adjustments with your telescope's main focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the 37mm to 47mm focus range on the SVBONY adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter functions as a simple helical focuser. After threading it onto your telescope's M42 focuser, you can extend or retract the 1.25\" barrel by twisting the main body of the adapter. This provides smooth, continuous adjustment within its 10mm travel range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this SVBONY adapter work with my 8\" f\/5 Newtonian reflector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, provided your 8\" f\/5 Newtonian's focuser has a male \u003cstrong\u003eM42x0.75 thread\u003c\/strong\u003e for accessory attachment. This adapter is specifically designed for reflector telescopes and is an excellent tool for adding fine-focus capability, which is especially useful at faster focal ratios like f\/5.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY M42 adapter for attaching a planetary camera to my reflector for imaging Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This is an ideal use case. The adapter's fine focus control allows you to make the precise, minute adjustments necessary to get Jupiter's cloud bands perfectly sharp, something that can be difficult with a coarse primary focuser. The three locking screws will hold your camera securely and centered.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the M42x0.75 thread on the SVBONY adapter signify?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eM42x0.75 is a standard thread size in astronomy, often called a \"T-thread\" or \"T2-thread.\" The 'M42' refers to the 42mm diameter, and '0.75' refers to the 0.75mm thread pitch. This adapter has a female M42x0.75 thread, meaning it will connect to any focuser or accessory with a corresponding male thread.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the three-screw design on the SVBONY adapter important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe three-screw design provides a more secure and centered grip on your 1.25\" accessory compared to a single screw. It prevents the eyepiece or camera from tilting, which is critical for maintaining good optical alignment, especially during astrophotography.\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\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM42*0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShortest Focus Distance\u003c\/td\u003e\n\u003ctd\u003e37mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLongest Focus Distance\u003c\/td\u003e\n\u003ctd\u003e47mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e70g \/ 2.46oz\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\"\u003eSVBONY 1.25\" 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\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861262561565,"sku":"SV-F9163A","price":14.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-1-25-Telescope-Focuser-Adapter-M42x0-75-for-Reflector-1_cf8b0cce-8567-4d6f-81ff-357cb7980220.jpg?v=1788660694","url":"https:\/\/davidastro.com\/fr-us\/products\/svbony-telescope-focuser-adapter-m42x0-75-for-reflectors-125in","provider":"David Astro","version":"1.0","type":"link"}