305 second exposure. Modified Canon Digital Rebel DSLR camera.
5" f/5 refractor at prime focus.
Gum 15 is a faint emission nebula in Vela, not far from the Vela supernova remnent. The open cluster at the bottom of the image is NGC 2671, while the large, faint nebula to the east (left) is part of Gum 17.