Telescope Camera Indexing Ring

This is an indexing ring designed to fit on a focuser with 63mm threads. This is held in place between the focuser and the imaging train by the 1.5mm flange in the middle. The gradations are in 5 degree increments. Users would set the ring in place, take an image, analyze the angle of the image, and then loosen/rotate/tighten to set the indexing circle to the correct angle.