Combination of 4, 180 second images. Modified Canon Digital Rebel DSLR camera. 5" f/5 refractor at prime focus.
NGC 6939 is a fairly large and rich cluster in Cepheus. However, since the stars are almost all below 10th magnitude, a telescope is required for a good view. In the same field of a wide-field telescope is the beautiful, face-on galaxy, NGC 6946