{"product_id":"player-one-1-25-to-m42-rotolock-adapter","title":"Player One 1.25″-to-M42 Rotolock Adapter","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Player One 1.25″-to-M42 Rotolock Adapter joins a 1.25″ fitting to an M42 × 0.75 (T2) thread using a rotolock quick-lock collar. A clockwise twist of the collar centers and clamps the 1.25″ side — clockwise to lock, counterclockwise to release — while the M42 × 0.75 thread takes a planetary camera or other T-thread accessory. It is designed for planetary imaging, where a centered, repeatable hold keeps the target on the sensor. The body is metal.\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 planetary camera with an M42 (T2) thread and want to drop it into a 1.25″ focuser or nosepiece with a centered, secure hold each time, rather than relying on a single compression screw.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotolock collar:\u003c\/strong\u003e a clockwise twist centers and clamps the 1.25″ side; counterclockwise releases it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM42 × 0.75 (T2) thread:\u003c\/strong\u003e takes a planetary camera or other standard T-thread accessory.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentered hold:\u003c\/strong\u003e the collar seats the accessory concentrically instead of pushing it off-axis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal construction:\u003c\/strong\u003e machined for a firm, repeatable clamp.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003ePlanetary and lunar imaging with an M42\/T2 camera dropped into a 1.25″ focuser, and general use joining a T-thread accessory to a 1.25″ fitting with a centered hold.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe adapter bridges a 1.25″ fitting and an M42 × 0.75 (T2) thread, holding the 1.25″ side with its rotolock collar. M42 × 0.75 is the common T-thread used by planetary cameras. It is a mechanical adapter only — no power or data passes through it.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical adapter only:\u003c\/strong\u003e it is purely a mechanical connection between 1.25″ and M42 × 0.75; it passes no electronic signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM42 × 0.75 (T2), not M42 x 1:\u003c\/strong\u003e the thread is the 0.75 mm-pitch T-thread used on cameras, not the 1 mm-pitch M42 lens mount.\u003c\/li\u003e\n\u003c\/ul\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 — thread your M42\/T2 camera onto the M42 side, then twist the rotolock collar clockwise to lock the 1.25″ side into your focuser. Twist back to release.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003ePlanetary and lunar imaging with an M42\/T2 camera, and joining a T-thread accessory to a 1.25″ fitting with a centered, repeatable hold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread is the M42 side?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eM42 × 0.75 — the standard T2 camera thread.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a metal adapter that pairs a rotolock 1.25″ collar with an M42 × 0.75 (T2) thread, giving planetary cameras a centered, repeatable hold in a 1.25″ focuser.\u003c\/p\u003e","brand":"Player One Astronomy","offers":[{"title":"Default Title","offer_id":53834274209903,"sku":"RL125-M42","price":54.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ROTOLOCK-1.25-M42-01-1024x1024.jpg?v=1784239575","url":"https:\/\/ontariotelescope.com\/products\/player-one-1-25-to-m42-rotolock-adapter","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}