Horsehead Nebula (B33)
My second mosiac, 4 hours of 45s and 30s exposures through my cpc 800 in alt/az at f6.3 with a canon XSi at iso 1600. There were significant internal reflections, which can still be seen on the edges of the frame, so much of the mosiac was sacrificed. Flats, darks, and bias frames used.