Amazon currently has the Sigma 50mm f/1.4 DG Art series lens for $849 (Reg $949) for both Canon and Nikon mounts.
PRODUCT HIGHLIGHTS
- 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