{"product_id":"takahashi-1-25-compression-ring-eyepiece-adapter-29mm","title":"Takahashi 1.25\" Compression Ring Eyepiece Adapter 29mm","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe 1.25\" Compression Ring Adapter is Takahashi's Eyepiece Adapter (31.7), threading M36.5 x 1.0 male into the optical train and opening a 1.25\" compression-ring seat for eyepieces and other 1.25\" accessories. It carries a published light path of 29 mm — the amount it contributes to your optical train, not its physical length end to end.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if your Takahashi telescope ends in an M36.5 thread and you want a secure, compression-ring 1.25\" seat rather than a set-screw fitting.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25\" compression ring:\u003c\/strong\u003e clamps evenly around the eyepiece or accessory barrel rather than pinching it at one point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM36.5 x 1.0 male thread:\u003c\/strong\u003e the tube-side connection published in Takahashi's catalog.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e29 mm published light path:\u003c\/strong\u003e a fixed, known contribution to your back focus total.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAccepting 1.25\" eyepieces, Barlows, filters, or small imaging accessories on any Takahashi telescope ending in an M36.5 thread.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThreads onto any M36.5 x 1.0 male-compatible Takahashi drawtube or coupling. For an imaging train, the 29 mm figure is worth adding to your total back focus — the \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e tabulates every Takahashi adapter's light path alongside each telescope's back focus target.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIt is a visual-format fitting:\u003c\/strong\u003e the 1.25\" barrel it opens is sized for eyepieces and small 1.25\" accessories rather than a full-frame imaging sensor. Send us your setup if you are unsure whether your camera fits within a 1.25\" barrel.\u003c\/p\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 on at the tube side and the compression ring tightens with a single screw around whatever 1.25\" accessory is inserted.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOpening a secure 1.25\" seat for eyepieces, Barlows, filters, or small cameras on an M36.5-thread Takahashi telescope.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is a compression ring different from a set-screw adapter?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA compression ring clamps evenly around the full circumference of the barrel rather than pressing at a single point, which is gentler on the barrel finish.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 29 mm light-path, M36.5 male adapter that opens a 1.25\" compression-ring seat for eyepieces and small accessories.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047914655855,"sku":"TAK-TKP00101","price":127.27,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/takahashi-eyepiece-adapter-tkp00101-astronomy-plus-1.jpg?v=1786936514","url":"https:\/\/ontariotelescope.com\/products\/takahashi-1-25-compression-ring-eyepiece-adapter-29mm","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}