Alpine Astronomical Baader 3.3" SCT Visual Back Nut

This part is designed for the T-2 Astro Modular system. It allows mounting of a 2" eyepiece holder or other compatible equipment onto larger Schmidt-Cassegrain telescope (SCT) visual back threads like Celestron C11 or C14 without vignetting. The nut features a circular dovetail V-mount with set screws to secure the holder in place without rotation or tilting.