A superb lens that covers nearly every professional wide-angle task. Outstanding optical performance comes from three Aspherical lens elements, and (for the first time ever in an EF wide-angle zoom lens) two Ultra-low Dispersion UD elements. Weather-resistant construction, a rear gel filter holder, close-focusing to 11 inches (0.28m) and a circular diaphragm are among its many highlights.

Focal Length & Max Aperture:	15-85mm 1:3.5-5.6
Picture Size:	APS-C
Filter Diameter:	72mm
Lens Construction:	17 elements in 12 groups
Minimum Aperture:	f/22-36
Closest Focusing Distance:	0.35m
Focus Drive:	USM motor
Dimensions:	87.5mm in length
Weight:	575g