Jerry Tabachuk , Oct 20, 2006; 02:56 p.m.
are you happy with the setup you've got? It's free if under warranty, have to send it to the Canon repair facility, takes about a week to 10 days. I just sent the lens alone for calibration 70-200 f4/L and it performs the same after "focus and tilt were adjusted". The problem was a slight backfocusing, BTW this is on 30D. I know the lens is sharp, I suspect it is the combo that need to be calibrated.