{"product_id":"player-one-1-25-inch-extender","title":"Player One 1.25\" Extender","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds critical focus travel for guide cameras\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" barrel diameter\u003c\/li\u003e\n\u003cli\u003eMale M28.5 x 0.6 filter threads\u003c\/li\u003e\n\u003cli\u003eFemale M28.5 x 0.6 filter 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\u003ePlayer One 1.25\" Extender\u003c\/h2\u003e\n\u003cp\u003eThe Player One 1.25\" Extender is a simple, essential tool for achieving focus with guide cameras that have limited back-focus, featuring standard M28.5 x 0.6 male and female threads for direct compatibility with 1.25\" filters and nosepieces. This component provides the extra outward travel required when your guide camera cannot reach the focal plane of an off-axis guider or guidescope.\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\u003eSolving Focus Travel for Guide Cameras with M28.5 Threads\u003c\/h3\u003e\n\u003cp\u003eMany imaging setups, particularly those using off-axis guiders (OAGs), place the guide camera at a fixed distance from the pick-off prism. If your guide camera's sensor is recessed too deeply, you may run out of focuser travel. This extender inserts between your camera's 1.25\" nosepiece and the focuser, adding the physical length needed to push the camera outward and bring guide stars to a sharp focus.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Threading:\u003c\/strong\u003e With M28.5 x 0.6 female threads on one end and male threads on the other, it installs seamlessly into any standard 1.25\" accessory train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuider-Focused Design:\u003c\/strong\u003e Specifically intended for the low-profile bodies of modern CMOS guide cameras, this extender addresses a common point of failure in autoguiding setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and Lightweight:\u003c\/strong\u003e Adds minimal weight and length to your imaging train, preserving the balance of your telescope mount.\u003c\/li\u003e\n\u003c\/ul\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 Player One 1.25\" Extender?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts main purpose is to add physical length to your optical train to help a guide camera reach focus. This is most often needed when using an \u003cstrong\u003eoff-axis guider (OAG)\u003c\/strong\u003e or a separate guidescope where the guide camera cannot be positioned far enough back to achieve a sharp image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat threads does the Player One 1.25\" Extender use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe extender uses standard 1.25\" filter threads. It has \u003cstrong\u003eM28.5 x 0.6 female threads\u003c\/strong\u003e on one end and \u003cstrong\u003eM28.5 x 0.6 male threads\u003c\/strong\u003e on the other, allowing it to screw directly onto 1.25\" nosepieces, filters, or other compatible accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 1.25\" Extender help me focus my guide camera in a Celestron OAG on an EdgeHD 800?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a perfect scenario for this extender. If you have adjusted the helical focuser on your Celestron OAG to its limit and still can't get sharp guide stars, adding this extender will provide the extra outbound travel needed to bring the guide camera's sensor to the focal point of the pick-off prism.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Player One 1.25\" Extender with a planetary camera in my 10\" f\/4 Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile designed for guiding, you can use it with any 1.25\" camera if you need more out-focus travel. However, in a fast Newtonian, you typically need more *in-focus* travel, not out-focus. This extender would likely move your planetary camera even further from the focal plane, making it less likely to reach focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I thread a 1.25\" filter onto the Player One Extender?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The M28.5 x 0.6 threads are the standard for 1.25\" filters. You can thread a filter onto the male end of the extender or into the female end, depending on your desired configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack multiple Player One 1.25\" Extenders for more length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the male and female threads allow you to stack multiple extenders if you need significant additional spacing. However, be mindful that creating a long, unsupported chain of accessories can introduce flexure into your imaging train.\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis product consists of a single component. No additional items are included in the box.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Player_One_2026_Product_Catalog_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913433084189,"sku":"POA-125EXT","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-1-25-EXTENDER-1_28f6577a-bf94-4b99-bff3-3f69c6573cb2.jpg?v=1789091143","url":"https:\/\/davidastro.com\/fr-us\/products\/player-one-1-25-inch-extender","provider":"David Astro","version":"1.0","type":"link"}