 "Canon EF wide-angle lens - 20 mm" " Canon mm 2509A003 Camera & Camcorder Lenses CDW.com
"This ultra-wide-angle lens is ideal for serious applications. It is easy to hold and carry at 14.3 oz. (405g). It features floating rear focusing system. Sharp images are obtained at all subject distances." 
 "Canon EF-S 10-22mm f/3.5-4.5 USM Ultra Wide Angle Zoom Lens"@en
"Canon EF-S 10-22mm f/3.5-4.5 USM Ultra Wide Angle Zoom Lens"@en 
 Lens Mount: Canon EF-S Focal Length: 10-22mm Maximum Aperture: f/3.5 - 4.5 Minimum Aperture: f/22 - 29 Maximum Magnification: 0.17x Minimum Focus Distance: 0.79 ft. (24cm) Lens Construction: 13 elements in 10 groups Diaphragm Blades: 6 Focus Type: AF with inner focusing Image Stabilization: None Filter Size: 77mm Dimensions (Diam. x Length): 3.3 x 3.5 in. (83.5 x 89.8mm) Weight: 13.6 oz. (385g)