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Sigma 70-200mm f/2.8 DG DN OS Sports Overview High-Level Performance & Reliability A dynamic zoom designed for professionals, the Sigma 70-200mm f/2.8 DG DN OS Sports Lens excels at capturing sports, wildlife, and weddings. The large f/2.8 aperture allows impressive performance throughout the entire zoom range and provides reliable low-light performance. Dual HLA (High-response Linear Actuator) motors enable high-speed autofocus, helping you freeze action. Sigma's OS2 algorithm effectively stabilizes images, giving up to 7.5 stops of correction. Additionally, the superior weather resistance of Sigma's Sports line means you can take your 70-200mm f/2.8 out in the field with peace of mind. Combined with the 14-24mm F2.8 DG DN Art and the 24-70mm f/2.8 DG DN Art, these three zoom lenses for full-frame mirrorless cameras with a bright f/2.8 constant aperture cover a wide range of focal lengths. Dual HLA Autofocus Driven by dual HLA (High-response Linear Actuator) motors, quick and quiet autofocus is provided, greatly benefiting the quality of both photo and video content taken with this lens. Its floating focus configuration creates significantly less movement in each focus group, resulting in extremely responsive focusing performance. OS2 Algorithm Sigma's OS2 optical stabilization algorithm provides up to 7.5 stops of image stabilization making the lens more well-suited for handheld usage and gives users the luxury of shooting at slower shutter speeds while maintaining image sharpness. Two OS modes are available. Mode 1 is intended for general shooting, while Mode 2 features Sigma's Intelligent OS algorithm and is ideal for panning shots and sports capturing. Additional Benefits Aperture ring with click and lock switches Tripod socket to distribute weight evenly Carbon fiber-reinforced plastic lens hood 6 Custom Switches AFL button Focus mode switch Focus limiter switch OS switch Custom mode switch Aperture ring click switch