3 minutes exposure, Meade 416XT.
300mm f/6 newtonian at prime focus.
Mink 3-6, also known as PK 254 +5.1, is a small but bright planetary nebula in Pyxis. It was not a difficult object for an 8" telescope, and was clearly visible as a small, fairly uniform disk, when an OIII filter was used. It is a very easy object in a 12" telescope.