Low profile design Adds only 2 mm of optical path length (flange distance) for setups with tight back focus Total length is 8 mm Secure thread depth of 3 mm on each side Suitable for compact telescope configurations where space is limited Versatile T2 / M42 Thread Adapter Standard M42x0.75 mm male thread on both sides Connects securely two components with female T2 threads Compatible with cameras, eyepieces, and other astrophotography accessories Maximized light throughput Large 38 mm clear aperture to prevent vignetting Helps deliver maximum light to your camera or eyepiece for brighter, clearer views across the full field What you get One Double Sided M42 Male to M42 Male Thread Adapter Ready to integrate into your telescope setup out of the box Use scenarios Short back focus imaging: install between camera and telescope to minimize optical path without sacrificing field coverage Modular accessory linking: join two T2 threaded components such as a camera adapter and a focal reducer or field eyepiece Quick extensions: connect paired M42 male components to extend or reconfigure an astrophotography rig without complex adapters