M67 star cluster in Cancer. This is a stack of 5 x 3 minute exposures at ISO 1600 with the Canon 7D on the TMB 92mm apo refractor with Borg 0.85x reducer/flattener for f/4.5. Taken on a slightly hazy night, April 22, 2011 using AP 600E mount and SG4 autoguider. Same scale as M44 shot taken the same night (M44 92mm 7D).
The Amazing Sky 