M31 test to judge camera alignment. This one is just a single 1 minute luminance subframe. Might be inside/outside focus on the right, outside/inside focus on the left. DSI Pro III, Antares 0.5" focal reducer spaced for ~0.9 focal reduction, Celestron C80ED 80mm refractor, somewhere around f/6.5-f/7.0.
10-17-08, San Diego, CA.