Canon 10-22mm f/3.5-4.5 USM

This zoom lens provides ultra-wide coverage for non-full frame bodies, including the 50D, 60D, 7D, and the Rebel series.

It contains three aspherical lens elements, including a Super-UD element.

Equivalent to a 16-35mm zoom (full-frame)

Focuses as close as 9.5 inches