SIGMA 85MM F/1.4 DG HSM ART LENS FOR CANON EF
EF-Mount Lens/Full-Frame FormatAperture Range: f/1.4 to 16Two Low Dispersion ElementsOne Aspherical ElementSuper Multi-Layer CoatingHyper Sonic AF Motor, Manual OverrideRounded 9-Blade DiaphragmTSC Material, Brass Bayonet MountCompatible with Sigma USB Dock