{"product_id":"player-one-1-25-extender-20mm-m28-5","title":"Player One 1.25\" Extender (20mm, M28.5)","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Player One 1.25\" Extender is a machined metal spacer that adds a fixed 20 mm of optical-train length between 1.25-inch threaded components. It carries M28.5 × 0.6 female threads on one end and M28.5 × 0.6 male threads on the other, so it threads in line without changing the thread standard. It was designed for use with guide cameras and other M28.5 (1.25-inch) threaded accessories, where a small amount of extra spacing is needed to reach focus or clear a filter.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you are building a 1.25-inch guiding or imaging train and need to add length between two M28.5-threaded parts — for example, spacing a guide camera back from a filter or nosepiece so the assembly reaches focus.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed 20 mm spacing:\u003c\/strong\u003e adds 20 mm of length (plus 2.5 mm of engaged thread) in a single component.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM28.5 × 0.6 threads:\u003c\/strong\u003e female one end, male the other — the standard 1.25-inch filter\/accessory thread.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal construction:\u003c\/strong\u003e machined metal body for a rigid, repeatable join.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical only:\u003c\/strong\u003e no optical elements and no electronic connection.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide-camera spacing:\u003c\/strong\u003e extend a guide camera back from a filter, nosepiece, or off-axis guider port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25-inch train building:\u003c\/strong\u003e add a known 20 mm step when a threaded 1.25-inch assembly needs to reach focus.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility \u0026amp; Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eBoth ends use the M28.5 × 0.6 thread standard common to 1.25-inch filters and accessories — female on one side, male on the other. It passes the 1.25-inch thread straight through and does not adapt to any other standard. If you are not sure how much spacing your train needs, send us your camera and accessory setup and we will work it out with you.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical adapter only:\u003c\/strong\u003e it adds length and carries the thread — there are no optics and no electronic communication through it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed length:\u003c\/strong\u003e the 20 mm step is not adjustable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread standard:\u003c\/strong\u003e both ends are M28.5 × 0.6; it does not convert 1.25-inch to any other thread.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — it threads directly in line between two M28.5 components and needs no tools or adjustment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much length does it add?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e20 mm, plus 2.5 mm of engaged thread.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it change the thread size?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo. Both ends are M28.5 × 0.6, so it keeps the 1.25-inch thread standard on both sides.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it have any optics?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo. It is a mechanical spacer with no optical elements and no electronic connection.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a machined metal 20 mm spacer with M28.5 × 0.6 threads on both ends, made to add a known step of length inside a 1.25-inch guiding or imaging train.\u003c\/p\u003e","brand":"Player One Astronomy","offers":[{"title":"Default Title","offer_id":53834272604271,"sku":"125EXT","price":16.8,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1.25-EXTENDER-1024x1024.jpg?v=1784239493","url":"https:\/\/ontariotelescope.com\/products\/player-one-1-25-extender-20mm-m28-5","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}