Sorry the 50D image is by far the worst, completely useless at that ISO, the 7D is much better, but still bad. However, the 7D shot is slightly underexposed compared to the other 2 IMO; the white label on the bottle is more grey on the 7D shot. Probably 1/4 stop under the 5D II and 1/3-1/2 under the 50D.