Adorama has the Tokina Opera EF 16-28mm F/2.8 FX as their Deal of the Day for only $529 (Reg $699).
Zoom Focal Length: 16-28mm Lens
Maximum Aperture: f/2.8
Image Stabilization Type: No
Lens Series: Tokina FX Series, Tokina opera Series
Special Features: Aspherical
Tokina Opera EF 16-28mm F/2.8 FX $529 (Reg $699)