{"product_id":"orion-optics-uk-ag-wynne-adpt-for-m42x0-75-t-thread-uses-25mm-bfd-with-4mm-adj","title":"Orion Optics UK AG Wynne Adapter for M42 T-Thread","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for Orion Optics UK AG Wynne Correctors\u003c\/li\u003e\n\u003cli\u003eSets a Nominal 25mm Back Focus Distance\u003c\/li\u003e\n\u003cli\u003eProvides ±4mm of Fine Adjustment (21mm to 29mm Range)\u003c\/li\u003e\n\u003cli\u003eConnects to Cameras via a Standard M42x0.75 T-Thread\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\u003eOrion Optics UK AG Wynne Adapter for M42 T-Thread\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK AG Wynne Adapter for M42x0.75 T-thread cameras establishes a precise 25mm back focus distance, with a critical ±4mm adjustment range to achieve a perfectly flat field with fast astrograph optics.\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\u003ePrecision Back Focus Control: 25mm BFD with ±4mm Adjustment\u003c\/h3\u003e\n\u003cp\u003eHigh-performance Wynne correctors require exact sensor spacing to deliver their designed image quality. This adapter sets the nominal back focus at 25mm and provides a ±4mm adjustment range, allowing you to dial in the perfect distance from 21mm to 29mm. This fine control is essential for compensating for variations in filter wheels, off-axis guiders, and camera sensor depths, ensuring sharp stars across the entire image field.\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\u003eM42x0.75 T-Thread Interface: Secure Connection for Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eThe output features a standard M42x0.75 male T-thread, ensuring direct, secure compatibility with the vast majority of dedicated astronomy cameras and DSLR\/mirrorless T-rings. This rigid, threaded connection prevents tilt and flexure within the imaging train, preserving the precise optical alignment demanded by fast astrograph systems from Orion Optics UK.\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 purpose of the Orion Optics UK AG Wynne Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is designed to connect an astronomy camera with standard M42x0.75 T-threads to an Orion Optics UK AG Wynne corrector. Its main function is to set the precise back focus distance required for optimal optical correction, which is nominally \u003cstrong\u003e25mm\u003c\/strong\u003e, and allow for fine-tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the ±4mm adjustment on the AG Wynne Adapter so important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e±4mm adjustment range\u003c\/strong\u003e is critical for achieving a perfectly flat field. Every component in your imaging train (filters, off-axis guiders, sensor covers) affects the optical path length. This adjustment allows you to compensate for these differences and dial in the exact sensor-to-corrector spacing for the sharpest possible stars from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat cameras are compatible with the AG Wynne Adapter's M42x0.75 T-thread?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe M42x0.75 T-thread is the industry standard for most dedicated astronomy cameras from brands like ZWO, QHY, Atik, and others. It is also compatible with DSLR and mirrorless cameras when they are fitted with a corresponding M42 T-ring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I use a ZWO camera with a 17.5mm back focus and a 5mm filter, can I use the AG Wynne Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Your required back focus would be approximately 17.5mm + 5mm = 22.5mm. The Orion Optics UK AG Wynne Adapter has an adjustment range from 21mm (25mm - 4mm) to 29mm (25mm + 4mm), which comfortably includes the 22.5mm distance you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I set the 25mm back focus precisely with the AG Wynne Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter is designed around a nominal 25mm distance. You would start by setting it to the midpoint of its adjustment. Then, take test exposures and analyze the star shapes in the corners of your image. Adjust the spacing in small increments using the ±4mm range until the corner stars are as round and sharp as the stars in the center.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this AG Wynne Adapter compatible with correctors from other brands?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is specifically engineered for the optical and mechanical requirements of \u003cstrong\u003eOrion Optics UK AG Wynne correctors\u003c\/strong\u003e. While the threads may be physically compatible with other components, using it with a different corrector is not recommended, as it may not provide the correct back focus or mechanical stability for that specific optical design.\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eWynne Corrector Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget Back Focus\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment Range\u003c\/td\u003e\n\u003ctd\u003e±4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 T-Thread (Male)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eOrion Optics UK AG Astrographs with Wynne Correctors\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\"\u003eAG Wynne adapter for M42x0.75 T thread\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\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942386200861,"sku":"OOUK-AG-WYNNE-ADPT-M42X0-75-5","price":297.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_63ab6427-bcf4-4448-90ed-78433722099f.jpg?v=1789607465","url":"https:\/\/davidastro.com\/en-us\/products\/orion-optics-uk-ag-wynne-adpt-for-m42x0-75-t-thread-uses-25mm-bfd-with-4mm-adj","provider":"David Astro","version":"1.0","type":"link"}