Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary Lens for Canon EF or Nikon F (w/ Free Filter) $599 @ B&H Photo w/ Free Shipping

Canon EF
Nikon F
w/ free Sigma 67mm WR UV Filter
Specs:
Aperture Range: f/5 to f/22
Four SLD Glass Elements
Super Multi-Layer Coating
Hyper Sonic AF Motor, Manual Override
Optical Stabilizer
Rounded 9-Blade Diaphragm
TSC Material, Brass Bayonet Mount
Compatible with Sigma USB Dock