TheSigma 24-70mm f/2.8 IF EX DG HSM Lensis a large aperture standard zoom lens that covers a range from wide angle to short telephoto. It is ideal for general photography such as snapshots, portraiture and landscapes. When used on digital Sigma SLR cameras such as the SD-14 or SD-15, the lens crop factor renders this lens the equivalent of a 41-119mm lens on a full-frame camera.
DG is a designation that Sigma uses on lenses featuring optical systems designed to meet the performance characteristics of digital SLR cameras. The Super Multi Layer Coating reduces flare and ghosting, and the use of ELD and SLD glass provides excellent correction of all types of aberrations. The Hyper Sonic Motor (HSM) ensures a silent, high-speed AF function with compatible cameras as well as full-time manual focusing capability.