{"product_id":"takahashi-f-8-visual-extension-tube","title":"Takahashi f\/8 Visual Extension Tube","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe f\/8 Visual Extension Tube is Takahashi's Extension Tube (L) — a short M43 x 0.75 spacer for f\/8 Takahashi refractors that adds a published 34 mm to a visual train. It's the longer of Takahashi's two M43 extension tubes, plain machined metal with no optics of its own.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if your f\/8 Takahashi refractor needs more in-travel than a diagonal or eyepiece holder alone can reach on an M43-threaded accessory chain.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM43 x 0.75 thread:\u003c\/strong\u003e Takahashi's standard visual-accessory thread on f\/8 models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtension Tube (L) — part TKP00106:\u003c\/strong\u003e Takahashi's own designation for this specific length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e34 mm light path:\u003c\/strong\u003e the longer reach in Takahashi's M43 extension pair, useful when the shorter S tube still leaves you short of focus.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eUse it to add 34 mm of spacing ahead of a diagonal or eyepiece holder on an M43-threaded Takahashi visual train, or to reach focus where the stock drawtube travel falls short.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIt threads onto Takahashi's M43 x 0.75 visual accessory standard. The published 34 mm is what it adds to the optical train, not the figure you'd get from measuring the tube end to end with calipers — thread engagement on each side changes where the light path actually starts and stops. The \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e tabulates this figure next to every Takahashi telescope's back focus target.\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 directly into the M43 visual train with nothing to align.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAdding 34 mm of spacing to reach focus or hit a specific backfocus figure in a visual train.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is it different from the f\/6 Visual Extension Tube?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eTakahashi lists it as the Extension Tube (L) — 34 mm, against the Extension Tube (S)'s 26 mm.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA 34 mm M43 extension tube built for f\/8 Takahashi visual trains. If you're unsure whether the 26 mm or 34 mm tube is the one you need, send us your telescope and eyepiece setup and we'll work it out with you.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047917146223,"sku":"TAK-TKP00106","price":61.49,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tsp0060_2_6.jpg?v=1786936601","url":"https:\/\/ontariotelescope.com\/products\/takahashi-f-8-visual-extension-tube","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}