This 11.1x high zoom ratio lens incorporates Sigma's original OS function & offers a broad shooting range from wide angle to telephoto. The optical technology enables easy handheld photography with a compact construction, making it ideal for various scenes such as landscape, sport & general photography. The compact construction guarantees excellent mobility making ideal for travel photography. FLD ("F" Low Dispersion) glass, which has performance equal to fluorite, SLD (Special Low Dispersion) glass elements, & aspherical lens elements provide high image quality throughout the entire zoom range. Sigma's HSM (Hyper Sonic Motor) ensures fast & quiet auto-focusing.