"The Sigma 24-105mm F4 DG HSM Art lens is a premium lens designed for full frame cameras and will also work with APS-C sensors with an effective increase in focal length. The 24-105mm F4 is a highly versatile focal range and staple everyday lens. With the increasing resolution power of new sensors, it is designed to bring out the true potential of evolving camera technology. Sigma's 24-105mm f4 includes proprietary Sigma technology including the Hyper Sonic Motor (HSM) which ensures fast, quiet and accurate autofocusing. A 9 blade rounded diaphragm creates beautiful background blur, while FLD and SLD glass elements compensate for various aberrations, distortion and curvature. The use of Thermally Composite Material (TSC) reduces size and weight and as part of the new Global Vision design, it is compatible with the Sigma USB dock for further customization and the new Mount Conversion Service.|Versatile, Large Aperture, HSM and OS|Compatible with USB DocK & Mount Conversion Service|Includes Lens hood, front and rear caps"