Originally posted by Peter Zack Curious about this statement. Do you have anything to back this up? As I said earlier. A couple of guys I know bought 7D's and both have since sold their bodies. One moved from an XTi and the other from a 40D. Both felt the camera produced 'softer' looking images from their earlier models. One did a second shooter job for me at a wedding and the high ISO shots showed as much noise as the K20D at similar ISO's. I wasn't impressed with the 700 or so shots I'd seen.
This was based on something that Klaus said about 15 megapixel cameras (APS-C) hitting diffraction at f5.6. In his lens testing, he did not see improvements in lens sharpness over f5.6 on the 50D and attributed it to diffraction setting in at that point. I can only imagine what he would see with the 7D.
I guess I should say that he didn't see much loss of resolution after f5.6, he just didn't see improvements in lens sharpness after that point and actually a little softening.