I'm using two cameras: Canon EOS 400D (Digital Rebel XTi) and Canon EOS 450D (EOS Rebel XSi). 450D was more heavily used than 400D. Not so long ago I noticed that 450D's autofocus system works not ...
I've got an Canon 85mm f1.8 for sport photography and portraits. Testing it doesn't make me smile. I get backfocus at f1.8 and f2.8, but front focus at 2.0 and 2.2. This varies at different distances. ...