The Canon EF-S 17-85mm f/4-5.6 IS USM is wide-angle EF-S zoom lens. Targeted at advanced digital photographers, this lens is designed to work exclusively with
Canon's EOS 20D, EOS 300D and EOS 350D digital SLR cameras.
The focal length range of this new lens is equivalent to 27-136mm and 16-35mm, respectively, in 35mm film format. The spread has been carefully chosen by Canon to reflect the needs of its rapidly growing base of advanced D-SLR photographers.