These wide angle photos were taken with Canon EF-S 10-22mm f/3.5-4.5 USM on the Canon 550d body.
Canon EF-S 10-22mm f/3.5-4.5 USM
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