Sigma 14-24mm f/2.8 DG HSM Art Lens (Canon EF or Nikon F)

EF-Mount Lens/Full-Frame Format
Aperture Range: f/2.8 to f/22
3 FLD, 3 SLD, and 3 Aspherical Elements
Super Multi-Layer Coating
Hyper Sonic AF Motor, Manual Override
Weather-Sealed Brass Bayonet Mount
Rounded 9-Blade Diaphragm
Minimum Focus Distance: 10.2"