Canon 70-200
Out of context: Reply #11
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- vaxorcist0
NOTE NOTE NOTE!
I've used a certain 70-200 F2.8 IS mark I version, both with a 5D mark I and a 5D mark II. For some odd reason, the lens often backfocused with the 5D mark II, but was fine with the 5D mark I. We have to send it to Canon to get it recalibrated... argh, and/or use manual focus for a while. I wish the 5D series had a focus fine tune the way certain other bodes do.....
So test if you can, we did the angled magazine print taped to the wall test. i.e. put a print-heavy magazine page sideways taped on a wall... highlight a few words on one line of text, aim camera at 45 degree angle to wall, on tripod, turn of IS, then focus on that highlighted line of text using AF, then shoot a number of pictures using manual focus, with slight focus variations, compare them at 100% in computer, not camera, and figure out if your lens is backfocusing or frontfocusing just a little bit... it's AAARGH to have such a great lens and body and not quite sharp images..