Canon EF-S 17-85mm f/4-5.6 IS USM review
This EF-S lens brings true wide-angle to tele coverage to EOS 20D and
Digital Rebel shooters. It has Canon’s Image Stabilization system,
allowing safe hand-holding at speeds up to three stops slower than
otherwise possible. And of course, it’s optically optimized for
digital SLRs. A ring-type USM means both fast and silent AF, as well as
full-time manual focus when in the AF mode.