{"product_id":"takahashi-m52-to-m48-adapter-ring","title":"Takahashi M52 to M48 Adapter Ring","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA Takahashi thread adapter ring that converts between M52 and M48 in an imaging train. M48 is the widely used 2-inch filter thread that most camera adapters, filter drawers and spacers are built around, so a ring like this is often the piece that lets a Takahashi corrector meet the rest of a train without an improvised solution in the middle.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you have an M52 thread on one side of your imaging train and an M48 interface on the other, and you want Takahashi's own ring rather than a third-party adapter to bridge them.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM52 to M48 conversion:\u003c\/strong\u003e the two thread standards named in the model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical only:\u003c\/strong\u003e no optical elements — it does not change focal length, focal ratio or field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTakahashi-made:\u003c\/strong\u003e machined to Takahashi's own thread tolerances, which is the reason to use the manufacturer's ring in a train built around their correctors.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eJoining an M52 component to an M48 one in a Takahashi imaging train — between a corrector and a camera adapter, between spacers, or where a filter drawer or accessory arrives on the M48 standard.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eTakahashi publishes M52 × 0.75 as the camera-side thread on the FC\/FS Multi Flattener 1.04x and on the Multi Reducer 0.85x, so that is the most common place an M52 face turns up in a Takahashi train. If that is the M52 in your setup, tell us and we will confirm the pairing before you order.\u003c\/p\u003e\u003cp\u003eTakahashi publishes the thread standards for this ring but not its optical length, and optical length is what decides whether your train still lands on its required backfocus. Send us the corrector, spacers and camera you are joining and we will work the total through with you.\u003c\/p\u003e\u003cp\u003eIf you need M52 to M54 instead, that is a separate Takahashi ring — the \u003cstrong\u003eM52-M54 Ring\u003c\/strong\u003e — and we stock it alongside this one.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOptical length is not published:\u003c\/strong\u003e every ring in a train adds to the backfocus total. If your corrector has a spacing figure to hit, that total is the thing to get right — and it is a calculation we are happy to do for you.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMechanical only:\u003c\/strong\u003e this ring changes the thread, nothing else. It has no effect on focal length, focal ratio, image circle or corner correction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThread pitch is not published either:\u003c\/strong\u003e Takahashi lists the ring by its M52 and M48 designations without stating the pitch on each face. If you are mating it to a non-Takahashi component, send us the part and we will confirm the thread before you order.\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 between the two components. The thinking happens beforehand, in the backfocus total.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat threads does it convert?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eM52 and M48.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it change my focal length or image circle?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — there are no optics in it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere does the M52 side usually connect?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eTakahashi publishes M52 × 0.75 as the camera-side thread on the FC\/FS Multi Flattener 1.04x and the Multi Reducer 0.85x. Send us your corrector and we will confirm it against your train.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know it will not upset my spacing?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSend us your train and we will add it up. That is the part worth checking, and it takes us a couple of minutes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between this and the M52-M54 ring?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOnly the camera-side thread. This one lands on M48, the 2-inch filter thread standard; the other lands on M54.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA Takahashi M52-to-M48 thread ring — the piece that joins a Takahashi corrector to the M48 standard the rest of an imaging train is usually built on, with the backfocus total being the thing to confirm.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54144023724143,"sku":"TAK-TSB00261","price":40.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tsb00261-1.jpg?v=1787769542","url":"https:\/\/ontariotelescope.com\/products\/takahashi-m52-to-m48-adapter-ring","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}