{"product_id":"takahashi-36-5mm-2-accessory-extension-tube-for-eyepiece-turret","title":"Takahashi 36.5mm 2\" Accessory Extension Tube for Eyepiece Turret","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 36.5 mm 2″ extension tube for the Takahashi eyepiece turret. On several Takahashi telescopes the turret will not reach focus without it, so this tube is a requirement rather than an option on those models — it adds the back-focus the turret needs to come to focus in the drawtube.\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 running — or about to buy — the Takahashi 4-turret eyepiece holder on one of the telescopes listed below.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e36.5 mm optical length:\u003c\/strong\u003e the extension the turret needs to reach focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2″ format:\u003c\/strong\u003e matches the turret's 2″ nosepiece fitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical only:\u003c\/strong\u003e a spacing component with no optical elements — it does not change magnification or field.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eVisual observing with the Takahashi 4-turret eyepiece holder, where four eyepieces stay mounted and rotate into place.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi lists this extension as required for turret use on the \u003cstrong\u003eFC-76S, FSQ-85, FSQ-106ED, FSQ-130ED, Mewlon-250CRS and Mewlon-300CRS\u003c\/strong\u003e. If your telescope is not on that list and you are planning a turret, send us the model and we will work out the back-focus with you before you order.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eRequired, not optional, on the listed telescopes:\u003c\/strong\u003e the turret will not reach focus on those models without this tube, so the two are bought together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe turret is separate:\u003c\/strong\u003e this listing is the extension tube alone. We stock the 4-turret eyepiece holder as well.\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 goes between the drawtube and the turret's 2″ nosepiece, and nothing needs adjusting afterwards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich telescopes need it?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe FC-76S, FSQ-85, FSQ-106ED, FSQ-130ED, Mewlon-250CRS and Mewlon-300CRS.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it change magnification?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — it has no optical elements. It is spacing only.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need it if I am not using a turret?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — it exists specifically to give the turret the back-focus it needs.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe 36.5 mm 2″ extension that lets the Takahashi eyepiece turret reach focus on the FSQ, FC-76S and Mewlon CRS telescopes.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54085941854319,"sku":"TAK-TKA00105","price":208.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/4-turret-takahashi_1_2_2.jpg?v=1787328653","url":"https:\/\/ontariotelescope.com\/products\/takahashi-36-5mm-2-accessory-extension-tube-for-eyepiece-turret","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}