M 81

22nd April.2011
Vixen VC200L @f/6.4, G11 mount
SBIG ST2000XM CCD camera @-15°C
LRGB with R=R+Hα, L 11x300s, Hα 4x300s, RG 3/3x300s, B 2x300s+3x120s. RGB and Hα 2 x 2 binned
Rhein-Main area, Germany
North is on top of the image