SIGMA 24-35MM F/2 DG HSM ART LENS FOR CANON EF
EF Mount Lens/Full Frame FormatAperture Range: f/2 to 16FLD & Special Low Dispersion ElementsTwo Aspherical ElementsSuper Multi-Layer CoatingHyper Sonic AF MotorInternal Focus; Manual Focus OverrideRounded 9-Blade DiaphragmThermally Stable Composite MaterialCompatible with Sigma USB Dock