M51
Taken through a 10" RC Optical Systems Ritchey-Chretien at f/9
SBIG ST-8E with CFW-8, AO-7 guider
MI-250 Mount
Taken at Little Blair Valley,CA April 13, 2002
LRGB Luminance=17X10 minutes R=3X10 minutes G=3X10 minutes B=3X12
minutes
Luminance was at full resolution. RGB frames taken at 2X binning.
Processed with Maxim/DL and Photoshop