An overseas friend with a 20D, sent me these comments tonite, asking to compare his problem with his 20D to my new 5D. I haven't gotten far enough along to know anything yet, but I thought I'd post part of his message here to see if it's familiar to any of our many 20D folks...
I mostly want to know about the autofocus and internal camera shake in
slow shudder speed shooting conditions and shooting with a tripod at a
125th or a 60th indoors (to soak in ambient light mixed with flash like
in restaurant shootings) without getting mirror shake which rattles the sensor
chip in the 20D.
Currently, I can not, under any circumstances shoot in existing light at
below a 250th if I want a sharp image. This is because when the mirror
locks up to get out of the way of the light path, it vibrates so much
that the sensor chip vibrates also. Canon knows about this and ain't
telling you. I am hoping the 5D works better as there is no pop up flash
and more room for the mirror and the larger prizm. Also, it is possible
that the added body weight of the 5D will help stablize the camera from
vibrating so much during the lock up. Just my hopefull speculations.
Very interested to hear anything to shed some light on this problem, it sounds a bit farfetched for Canon, but this guy as a long-time pro and knows his gear, and he's in Bangkok where I think they build these things... I'm concerned because I'm probably going to buy one as a backup for my 5D.
Regards,
Andy Pearlman
Andy Pearlman Studio