SIGMA 50-100MM F/1.8 DC HSM ART LENS FOR CANON EF

EF-Mount Lens/APS-C Format
80-160mm (35mm Equivalent)
Aperture Range: f/1.8 to f/16
Four SLD Elements, Three FLD Elements
One High-Refractive Index Element
Super Multi-Layer Coating
Hyper Sonic Motor AF System
Fixed, Rotating Tripod Collar
Rounded 9-Blade Diaphragm