M57 in Context

Astro-Physics 5-inch F6 at F4.3
Unguided on Astro-Physics Mach1GTO
0.75x telecompressor with custom spacer
SBIG ST2000XM CCD, chip cooled to -15°C
Astrodon Generation One, E-series filters
10x20s in R, G, and B (total = 10 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 show off star colors: Star Spikes Pro by Noel Carboni.

©2010, David Cortner