BlattWorld, Item Details: Canon EF-S 10-22mm f/3.5-4.5 USM

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 doesnt 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
Focal Length & Maximum Aperture
10 - 22mm; 1:3.5-4.5
Lens Construction
13 elements in 10 groups
Diagonal Angle of View
107° 30 - 63° 30
Focus Adjustment
Inner focusing system, with focusing cam
Closest Focusing Distance
0.24m / 0.79 ft.
Zoom System
Ring USM
Filter Size
77mm
Max. Diameter x Length, Weight
3.3 x 3.5, 13.6 oz. / 83.5 x 89.8mm, 385g