SIGMA 24-70MM F/2.8 DG OS HSM ART LENS FOR CANON EF
EF-Mount Lens/Full-Frame FormatAperture Range: f/2.8 to f/22Three SLD and Four Aspherical ElementsSuper Multi-Layer CoatingHyper Sonic AF Motor, Manual OverrideOptical StabilizerRounded 9-Blade DiaphragmTSC Material, Brass Bayonet MountCompatible with Sigma USB Dock