{"product_id":"player-one-m48m-m42m-2mm-adapter","title":"Player One M48M-M42M 2mm Adapter","description":"\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Player One M48M-M42M 2mm Adapter is a machined threaded coupler that joins an M48×0.75 male fitting to an M42×0.75 (T2) male fitting while adding 2 mm to the optical path. It is a purely mechanical part with no glass and no electronics, made from aluminum 6061-T6.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis is a good match if you are building an imaging train that needs to bridge an M48 connection to an M42\/T2 connection, or if you need a short, fixed 2 mm spacer to fine-tune backfocus between M48 and T2 components.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM48 to M42 thread conversion:\u003c\/strong\u003e M48×0.75 male on one side, M42×0.75 (T2) male on the other.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 mm optical length:\u003c\/strong\u003e adds a fixed 2 mm to the spacing between the two components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum 6061-T6 body:\u003c\/strong\u003e light, corrosion-resistant, and dimensionally stable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully mechanical:\u003c\/strong\u003e no optical elements and no electrical connection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eUse it wherever an imaging train needs an M48-male to M42-male junction — for example connecting M48-threaded accessories to T2-threaded cameras, filter drawers, or spacers — and where 2 mm of added length helps reach a target backfocus.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCompatibility \u0026amp; Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe adapter fits standard M48×0.75 and M42×0.75 (T2) threads. Because it is a fixed-length coupler, include its 2 mm in your total backfocus calculation. If you are not sure how it fits your imaging train, send us your camera, filter, and spacer setup and we will work out the numbers with you.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical adapter only:\u003c\/strong\u003e it carries no optical elements and passes no electronic signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMale on both sides:\u003c\/strong\u003e both ends are male threads, so the mating components need matching female threads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed 2 mm length:\u003c\/strong\u003e the spacing it adds is set and not adjustable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo — it threads directly onto standard M48 and M42\/T2 fittings by hand and needs no tools or adjustment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eJoining an M48 male fitting to an M42\/T2 male fitting and adding a fixed 2 mm to the optical path.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it contain any optics?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. It is a bare mechanical coupler with no lenses or coatings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it change my backfocus?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes — it adds 2 mm, which you should include in your spacing total.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn short: a compact aluminum M48-male to M42-male coupler that adds a fixed 2 mm to the optical path, for cleanly bridging M48 and T2 sections of an imaging train.\u003c\/p\u003e","brand":"Player One Astronomy","offers":[{"title":"Default Title","offer_id":53834274177135,"sku":"M48M-M42M-2","price":25.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/M48M-M42M-2mm-adapter.jpg?v=1784239573","url":"https:\/\/ontariotelescope.com\/products\/player-one-m48m-m42m-2mm-adapter","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}