{"product_id":"takahashi-universal-rack-and-pinion-focuser-36-4mm-mewlon-250","title":"Takahashi Universal Rack and Pinion Focuser 36.4mm (Mewlon-250)","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi's universal rack-and-pinion focuser in its 36.4 mm form, listed for the Mewlon-250. The 36.4 mm figure is the drawtube size — Takahashi's own long-standing thread standard, which their visual accessories and adapters are built around.\u003c\/p\u003e\u003cp\u003eA rack-and-pinion focuser drives the drawtube on a toothed rack rather than a friction roller, which is what gives it the ability to hold a load without slipping. On a Cassegrain like the Mewlon, where focus is often reached with a diagonal, eyepiece or camera hanging off the back, that matters.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you run a Mewlon-250 and want the 36.4 mm rack-and-pinion focuser, either as an upgrade or a replacement.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e36.4 mm drawtube:\u003c\/strong\u003e Takahashi's own thread standard for visual accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack-and-pinion drive:\u003c\/strong\u003e positive engagement that holds position under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListed for the Mewlon-250:\u003c\/strong\u003e one of four versions in this focuser range.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eVisual observing and imaging on a Mewlon-250, where the focuser carries a diagonal and eyepiece or a camera train.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi builds this focuser in four combinations: \u003cstrong\u003e36.4 mm and 50.8 mm drawtube sizes, each in a Mewlon-250 version and a Mewlon\/CN version.\u003c\/strong\u003e We stock all four. The drawtube size decides which accessories thread on — 36.4 mm is Takahashi's own standard, 50.8 mm is the 2″ format most modern eyepieces and imaging trains use. Tell us your telescope and what you are putting behind the focuser and we will confirm which of the four you want.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eFour versions exist:\u003c\/strong\u003e two drawtube sizes across two telescope fittings. Getting the right one is a matter of matching both, and we will do that with you.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e36.4 mm or 50.8 mm:\u003c\/strong\u003e if your eyepieces and adapters are 2″, the 50.8 mm version is likely the one you want. If you are working with Takahashi's own visual accessories, 36.4 mm is their native thread.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWe are still waiting on a product photo:\u003c\/strong\u003e Takahashi's listing carries no image for this focuser, so the page shows none rather than a picture of a different version. Ask us and we will photograph or describe the item in stock.\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\u003eFitting a focuser is more involved than adding an accessory — it mounts to the telescope's rear cell. If you would rather not do it yourself, talk to us about it before you order.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does 36.4mm refer to?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe drawtube size, which is Takahashi's own thread standard for visual accessories.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich telescope is it for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Mewlon-250.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould I get 36.4mm or 50.8mm?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e50.8 mm is the 2″ format that most modern eyepieces and camera adapters use; 36.4 mm is Takahashi's native standard. Tell us what you are attaching and we will advise.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe 36.4 mm rack-and-pinion focuser for the Mewlon-250 — one of four versions, so it is worth confirming the drawtube size against your accessories.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54086048776303,"sku":"TAK-TKA00707","price":1086.0,"currency_code":"CAD","in_stock":true}],"url":"https:\/\/ontariotelescope.com\/products\/takahashi-universal-rack-and-pinion-focuser-36-4mm-mewlon-250","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}