Canon EF-S 10-22mm F/3.5-4.5 USM SLR Lens.
Includes:
Tamron UV Filter
Lens Cap
Back Cap
Lens Hood
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