17-35mm f/4 EOS
For Canon mount
A pro-series lens designed for use with full frame bodies - ultra wide angle and a constant f/4 maximum aperture good for low-light photography. Features include Tokina's one-touch focus clutch mechanism - switch between MF and AF focus modes by a turn of the focus ring. Super-Low Dispersion glass elements allow for excellent image quality and sharpness. Better seals make for increased weather resistance (but not waterproof).