Celestron 9.25 inch F/10 SCT, SBIG ST8XE, L:30m, RGB:10m, 2x binned - taken from highly light-polluted suburban site
M57, Ring Nebula in Lyra
Amateur CCD Astronomy
By Richard D. Jacobs, M.D.
By Richard D. Jacobs, M.D.
Celestron 9.25 inch F/10 SCT, SBIG ST8XE, L:30m, RGB:10m, 2x binned - taken from highly light-polluted suburban site