This is the full frame image captured by the 1Ds at ISO1250. Lens wide open i.e. 1200mm at f8. I like the wide field of view because it makes it pretty obvious what a globular cluster is. North is to the left. 10x60sec exposures. Frames calibrated with 10 darks, 6 flats then stacked in ImagesPlus. Final tweaking in Picture Window Pro.