300 second exposure. Modified Canon Digital Rebel DSLR camera.
5" f/5 refractor at prime focus.
NGC 6164/6165 is a sometimes listed as a planetary nebula although it probably should be listed as a mass-loss star. The bright star in the middle of the 2 arcs is an O6 star that has been ejecting material. Most of the material is too faint to see visually, so all that is visible it the telescope are the two arcs, hence the two NGC designations. The arcs were easily visible in a 12" telescope and may be visible in an 8" under very dark skies.
The nebulosity to the left of the image is the nebula, NGC 6188. This is a wonderful region containing a mixture of emission and absorption nebulae and an open cluster, NGC 6193.