This may be off topic, but since Daniel put that link in there about full frame vs 1.6 crop.


Daniel, I looked at Bryan's comparison of the 200 f/2 lens, between the 50D and the 5DMk2, and the chart is noticably clearer with the 5DMk2.


http://the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=458&Camera=479&Sample=0&am p;FLI=0&API=3&LensComp=458&CameraComp= 474&SampleComp=0&FLIComp=0&APIComp=3


I did go through the thread you linked to, but it's too much information to digest for this late in the evening....[]