Sigma 135mm F/1.8 DG HSM Art Lens For Canon EF
EF-Mount Lens/Full-Frame FormatAperture Range: f/1.8 to f/16Two FLD Elements, Two SLD ElementsSuper Multi-Layer CoatingHyper Sonic AF Motor, Manual OverrideRounded 9-Blade DiaphragmTSC Material, Brass Bayonet MountCompatible with Sigma USB Dock