Mine focuses nice near MFD.
At say less then 5-10m distance it takes an MA of +18 to work. That is it getīs the focus right in 3 of 4 shots. Even when on a tripod it sometimes changes to badly oof when repeatedly half-pressing the shutter even on an good target. Switching to servo-af shows really nervous behaviour in the same situation.
Near infinity an MA of +18 definitely doesnīt work.
It think there is some influence wether you shoot in daylight or artifical lighting.
I dontīt have the nerve to experiment it to death.
By the way it went to Canon Service for that reason and came back worse than before. The remark of the technician was somewhat funny \"We tried our best\".
At least they managed to optimize the 17-55 significantly.
I wonīt send it in again until i hear they have a calibration software for the 7D wich is still not the case to my knowledge.
p.s.
My 85 1.8 and 50 1.4 wich didnīt work very well on my former 50D are near perfect now. The 70-200 f4 IS was/is very good on both. The 135 f2 was flawless on 50D and a little more inconsistent on 7D.
sigh
May 07, 2010 at 02:15 PM
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