Coma Corrector designed for fast f/ratio Newtonians (between f/4 and f/5)
– 2″ barrel
– brass compression ring
– 2″ fitting unscrews allowing wide T-rings for both Canon EOS and Nikon DSLR to attach directly for astrophotography.
– Back focus is 80mm +/- 2mm from Corrector Lens to image plane.
– Spacing may be required for some DSLT and CCD depending on length of your imager.