NGC7331 in Pegasus

This spiral galaxy lies at a distance of about 40 million light years. Notice the number of surrounding galaxies including Stehans Quintet to the upper left. I took this image under very clear sky conditions with a first quarter moon  to contend with. I was using my ten inch F4.8 reflector, an Atik 383L mono CCD camera with PHD auto guiding. I captured five minute sub frames and dark frames with flat field frames to reduce vignetting in the final compsition. The total exposure times were 50 minutes in blue, 30 minutes in green and 20 minutes using a red filter.