seems like the 70-200 2.8L IS is extremely easy to manually focus, even on the 20d. All my other lenses I find pretty much impossible to focus manually due to the small viewfinder. At first I thought it was because of the larger arperture, but my 50 1.8 is pretty much impossible to manually focus as well. Might be because of the better optics, but damn it seems easy. Had to manually focus alot of shots last night at a wedding I was shooting (the crzy lights at the reception were really screwing with AF).