Key Features

• Aperture Range: f/1.4 to f/16

• One Molded Glass Aspherical Element

• Three Special Low Dispersion Elements

• Super Multi-Layer Coating

• Floating System & Large Diameter Design

• Hyper Sonic AF Motor

• Rounded Nine-Blade Diaphragm

• Thermally Stable Composite Material

• Brass Bayonet Mount

• Compatible with Sigma USB Dock