Designed for 1.25" eyepieces and accessories, the Alpine Astronomical Baader 1.25"/T-2 Click-Lock Eyepiece Holder Adapter can be used to upgrade the conventional bronze compression ring and set screws on your telescope drawtube, diagonals, or Barlow lens, or be placed anywhere within Baader's Astro T-2 system. This unique system uses three long roller bearings to hold the eyepiece firmly centered in place without marking or marring it, and without the wobble that is common with conventional holders. A simple twist locks and unlocks the clamping system for fast eyepiece changes, and the top of the clamp comes off to reveal T-2 mounting threads that accept camera-specific T-rings and adapters. The Click-Lock adapter has 6.5mm of travel for use as a micro-focuser or to adjust its height for matching other accessories.