In the field, I almost always focus my TS-E 17 lens using Live View.
However, when I use the viewfinder and rely on the blinking focus lights to confirm focus, I find that the focus is a little off. Has anyone had this issue? I am thinking of sending my bodies and the lens to Canon service to get this calibrated. This is not really a problem since (as I indicated above) I use Live View for this lens, but still, I would like the alternative focus procedure to be be available, too.