More stacking-and-processing practice. This time, M27 the Dumbbell Nebula gave up its photons for my benefit.
Telescope: Meade 14" SCT w/Hyperstar operating at f/2
Camera: QSI colour CCD imager
Exposure" 20x30 second lights, 10x30 second darks, 10 flats.
Processing: Deep Sky Stacker, Irfanview, Photoshop. Contrast stretch in Curves and Levels, colour balance, unsharp masking, crop..