Combination of 20, 1 minute images, SBIG STL-1001E CCD.
16" f/10 schmidt-cassegrain at prime focus.
M 15 is a moderately bright globular cluster in Pegasus, situated some 4 degrees north-west of the star Enif. It is easily visible in binoculars and could be visible to the naked eye in very dark skies. The outer regions are resolved in an 8" telescope.