yes, i'm having focusing issues with my 7D. so far i can tell that more than half of my shots at the wider end (17mm~20mm) backfocuses and it's pretty annoying even in broad daylight or with the af assist beam. i didn't have this problem previously and now i'm thinking of sending the body and lens to the service center once i find some extra time. for the mean time, i use live-view at the wide end when the situation is quite tricky as it gives me the absolute sharpness i can get at any focal length.
i had some error code issues with the firmware it came out of the box but since i updated i never had those issues anymore.
does your 550D giving you better pictures than your previous 7D?




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