The ever-evolving 70 200mm is now available in the Sports line The F2.8 zoom lenses are the essential equipment for many professional photographers. 70-200mm F2.8 lenses in particular are expected to perform at their best in various challenging scenes, from news to sports, landscape, and portraits. The SIGMA 70-200mm F2.8 DG OS HSM Sports has high optical quality, a tough design and excellent handling - all of the features required by professional photographers and high-end amateurs. The all-round, ultimate 70-200mm F2.8 is now available. Combining all of the features required by professional photographers To make the lens lightweight while maintaining robustness, magnesium is used to ensure high mobility. As a lens from the Sports line, the dust- and splash-proof structure, together with the water- and oil-repellent coating on the front lens, ensures safe use even in the most challenging shooting conditions. The SIGMA 70-200mm F2.8 DG OS HSM Sports also incorporates Intelligent OS*1 with an acceleration sensor and the latest algorithm capable of panning in all directions. The high-speed AF, thanks to the HSM (Hyper Sonic Motor) with an updated algorithm, captures instantaneous photography movement Incorporating 10 exclusive low-dispersion glass elements To provide excellent correction of color aberration, nine FLD ("F" Low Dispersion) glass elements and an SLD (Special Low Dispersio n) glass element, in total ten exclusive low-dispersion glass elements are incorporated. From the center to the corners, extremely high resolution is realized, making the lens capable of meeting the most demanding needs of professional photographers in various s hooting conditions. By optimizing spherical aberration, a smooth and natural bokeh effect is ensured making the lens perfect for po rtrait photography. Customization is possible to improve versatility An AF Function button is provided to allocate various functions. By selecting it from the menu on camera bodies, or using the optional SIGMA USB DOCK, functions other than AF Lock can be allocated too. It expands shooting styles, depending on the user's preference. In addition, the tripod socket with 90½ click stops, made with a magnesium alloy which is both lightweight and tough, is incorporated to ensure easier changes of shooting position from vertical to horizontal and vice versa. It can be attached directly to an Arca Swiss type clamp. Other features • Tele Converters that are designed to match the current lens lineup (optional) can be attached • Tripod socket with high usability With 90 degree click (de-clickable) stops Replaceable lens foot (Can be used on monopod when removed) Compatible with Arca Swiss type clamps (with stopper screw) • Hood with lock • Equipped with a focus limiter • Manual Override (MO) capable of switching two full-time manual modes • 11-blade rounded diaphragm • Compatible with SIGMA MOUNT CONVERTER MC-11 • Compatible with SIGMA USB DOCK • Designed to minimize flare and ghosting • High-precision, rugged brass bayonet mount • "Made in Japan" craftsmanship