Sigma 10-20mm f/4-5.6 EX DC HSM Lens for Canon Digital SLR Cameras

10-20mm focal length

15-30mm equivalent focal length on APS-C cameras, 20-40mm equivalent focal length on Four Thirds / Micro Four Thirds cameras, 16-32mm equivalent focal length on Canon APS-C cameras

F4-5.6 maximum aperture; F22-32 minimum

Ring-type ultrasonic-type AF motor with full-time manual focusing

77mm filters

0.24m/9.45" minimum focus

Available in Canon EF, Four Thirds, Pentax KAF, Sony Alpha, Sigma SA, Nikon F (DX) mounts

Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.

10-20mm ultra-wide angle lens designed exclusively for Canon digital SLR cameras^3 special low dispersion (SLD) glass elements to compensate for color aberration^Hyper-Sonic Motor (HSM) produces silent, high-speed autofocus; full-time manual focus^Multilayer lens coating reduces flare and ghost; 9.4-inch close focusing distance^Measures 3.3 inches in diameter and 3.2 inches long; weighs 16.4 ounces