A quick data gathering and processing of M31, the Great Andromeda Galaxy.
L: 44 x 5 minutes
R: 3 x 5 minutes
G: 3 x 5 minutes
B: 3 x 5 minutes

APM 115/805 APO refractor, Apogee U8300, Astrodon Gen II LRGB filters.

A bit of blue gradient and color splotchiness on the lower left - clearly needs more RGB exposure time, flats, anti-gradient, list goes on.