Lightweight, reliable 1.25" to T2 / 1.25" eyepiece insert for fixed focus M42 telescope T adapter Key benefits Lightweight and reliable: easy to carry and install without adding noticeable weight to the optical train while providing a stable connection. Maintains fixed focus: designed for use with fixed focus M42 telescope T adapter, keeping focus settings consistent when switching accessories. Versatile compatibility: adapts standard 1.25" (31.7 mm) eyepieces to T2 or 1.25" insertion in M42 T-adapter systems, enabling quick changes between eyepieces and T2-threaded accessories. Function and compatibility Purpose: 1.25 to T2/1.25 eyepiece inserts in fixed focus M42 telescope T adapter. Fits standard 1.25" eyepieces and T2-threaded accessories; intended for use where an M42 fixed-focus T adapter is already in place. Ideal when you need a straightforward mechanical adapter to integrate eyepieces with T2 components without changing focus settings. Practical attributes Size: accepts standard 1.25" (31.7 mm) eyepieces and mates to T2/M42 adapter interfaces. Performance: provides a reliable mechanical interface for clear, repeatable attachment and alignment. Ease of use: simple to insert and remove for quick transitions between visual observing and accessory use. Use scenarios 1) Visual observing: insert a 1.25" eyepiece into your fixed focus M42 telescope T adapter for quick, lightweight eyepiece use in field sessions. 2) Accessory switching: connect T2-compatible accessories (such as a camera T-ring or other T2 components) while preserving the telescope’s fixed focus settings. 3) Hybrid setups: switch rapidly between visual eyepieces and T2-threaded devices during an observing session without refocusing. Notes Designed specifically for use with fixed focus M42 telescope T adapter setups. Confirm your eyepiece and accessory threads are standard 1.25" and T2 to ensure compatibility.