Excellent optical quality and true wide-angle coverage with select digital SLRs

Superior AF performance and speed, with full-time manual focus by simply turning ring

Close-focusing to 9.5 inches -- fill the frame with subjects as small as 3.6 x 5.4 inches

Relatively compact size and light weight for an ultra-wide zoom lens

Inner focusing system (no front element rotation); length doesn't change if zoomed

Circular aperture design -- natural highlights, even stopped down two stops

Electronic diaphragm -- manually-set apertures stay constant from f/4.5 thru f/22

EF-S lens mount -- exclusively for EOS 20D, 30D, 40D, 50D and Digital Rebel bodies