RCOS 12.5” F/9 RC, SBIG ST11K, L:60m, 5m 2X binned - from light polluted urban site
M13, Closer View
Amateur CCD Astronomy
By Richard D. Jacobs, M.D.
By Richard D. Jacobs, M.D.
RCOS 12.5” F/9 RC, SBIG ST11K, L:60m, 5m 2X binned - from light polluted urban site