Barnard's Galaxy. The "3rd Magellanic Cloud" - a satellite of the Milky Way about 1.6 MLyr distant. 3nM H-alpha mapped to yellow. Ha 13h L 13h RGB 90m. This photo shows deeper-than-usual faint features in H-alpha.
STL11000M on 20" PlaneWave CDK on modified MI-750 fork. All software, firmware, and electronics is my own design and build.