{"product_id":"takahashi-2-inch-sleeve-adapter","title":"Takahashi 2 Inch Sleeve Adapter","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi's own catalog designation for this part is the \"50.8 Sleeve\" — a short ring in the 50.8 mm (2\") accessory system with a published light path of 5 mm, the shortest spacer in the Takahashi accessory line.\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 system chart calls out this ring within a 2\" accessory chain, or you're replacing this specific part from an existing setup.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e50.8 mm (2\") sleeve fitting:\u003c\/strong\u003e Takahashi's own \"50.8 Sleeve\" designation for this ring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 mm light path:\u003c\/strong\u003e a small, fixed increment for fine-tuning spacing rather than bridging two different standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTakahashi part TKP00113\u003c\/strong\u003e — a single-piece machined ring with no moving parts.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eUse it where a Takahashi system chart specifies this part within a 2\" visual or imaging train, typically to add a small, fixed amount of spacing.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi's catalog lists this ring as the \"50.8 Sleeve,\" with a 5 mm light path — what it contributes to the optical train, not a caliper measurement of the part itself. It's a sleeve fitting rather than a thread adapter, and Takahashi doesn't spell out a separate 2\"-to-1.25\" step-down for this part number. If your train needs a confirmed 2\"-to-1.25\" step-down, send us your telescope and eyepiece setup and we'll confirm the exact part for it. The \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e is worth checking for the back focus target on your telescope once your full train is planned.\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's a single ring that fits directly into the 2\" accessory chain it was designed for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAdding a fixed 5 mm of spacing within a Takahashi 50.8 mm (2\") accessory train.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it convert 2\" to 1.25\"?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eTakahashi's catalog lists it only as a 50.8 mm sleeve fitting. Send us your setup and we'll confirm whether this or a different part gets you to 1.25\".\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi's \"50.8 Sleeve\" (TKP00113) — a 5 mm ring for a 2\" accessory train. If your goal is specifically a confirmed 2\"-to-1.25\" step-down, send us your telescope and eyepiece plans and we'll work out the right part with you.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047926616175,"sku":"TAK-TKP00113","price":81.51,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tkp00113_6.jpg?v=1786936705","url":"https:\/\/ontariotelescope.com\/products\/takahashi-2-inch-sleeve-adapter","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}