Suitable for the following photography: Travel, weddings, events and family Large aperture, stabilized, standard zoom lens FLD glass with performance equal to fluorite Carrying case, lens hood, front & rear caps HSM - QUIET & FAST AUTOFOCUSING This lens uses a motor driven by ultrasonic waves to provide a quiet, high-speed AF. OS - OPTICAL STABILIZER This function utilizes a built-in mechanism that compensates for camera shake. It dramatically expands photographic possibilities by alleviating camera movement when shooting by hand held camera. DG - DG FOR DIGITAL Designed to deliver the ultimate in performance on full-frame digital SLRs, Sigma DG lenses also bring out the best in 35mm SLR film cameras and APS-C size DLSRs. EX - EX LENS The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance. Sigma's 17-50mm F2.8 EX DC OS HSM large-aperture standard zoom lens covers a focal length from 17mm wide angle and offers a large aperture of F2.8 throughout the entire zoom range, making it ideal for many types of photography especially portraiture and landscapes. The OS, Sigma's anti shake feature offers the use of shutter speeds approximately 4 stops slower than would

be possible. The OS feature allows Sony and Pentax users the option of viewing a stabilized image in the viewfinder, a feature offered only by Sigma. HSM provides fast and quiet AF. Sigma's own FLD glass elements, which have performance equal to fluorite along with two glass mold and one hybrid aspherical lens, provide excellent correction for all types of aberrations. The Super Multi-Layer coating reduces flare and ghosting. This lens boasts superior peripheral brightness and provides sharp, high contrast images even at the maximum apertures. With a minimum focusing distance of 11 inches throughout the entire zoom range and a magnification ratio of 1:5. If you need to be ready for any photographic opportunity, even low light, then this Sigma lens is perfect. Compact and light weight, it's a necessary addition to your camera bag.