Sigma 14mm F/1.8 DG HSM Art Lens For Canon EF
EF-Mount Lens/Full-Frame FormatAperture Range: f/1.8 to f/16Three FLD Elements, Four SLD ElementsFour Aspherical ElementsSuper Multi-Layer CoatingHyper Sonic AF Motor, Manual OverrideRounded 9-Blade DiaphragmTSC Material, Brass Bayonet MountCompatible with Sigma USB Dock