M13

Astro-Physics 5-inch F6
Unguided on Astro-Physics Mach1GTO
SBIG ST2000XM CCD, chip cooled to -15°C
Astrodon Generation One, E-series filters
10x100s in R, G, and B (total = 50 minutes), 1 dark frame, no flats)
Acquisition and camera control: Nebulosity 2
Image alignment, stacking, and color combination: Maxim DL5
Spikes for fun and to conceal some internal reflections; Star Spikes Pro by Noel Carboni.

©2010, David Cortner