This Tokina AT-X 16-28mm f/2.8 Pro FX lens is the first in a new generation of lenses designed for full-frame professional digital SLR cameras. The 16-28 zoom range gives the professional photographer a super-wide angle of view to get close to subject for dramatic effect or to take in entire scenes.

The 16-28 f/2.8 uses a newly developed silent DC motor that allows the lens to focus faster and more quietly then previous generations. The DC motor coupled with a new GMR magnetic AF sensor work together to increase AF Speed.

A large sized aspherical glass element is incorporated into the front lens group, while there are 2 more aspherical elements in the rear group. 3 SD super-low dispersion glass elements are also incorporated through-out the optical design to reduce chromatic aberration, give maximum resolution, more even brightness and distortion correction.

Tokina's exclusive One-touch Focus Clutch Mechanism allows the photographer to switch between AF and MF simply by moving the focus ring forward for AF and back toward the camera to focus manually.

Focal length: 16-28mm

Maximum Aperture : f/2.8

Maximum aperture: f/2.8

Construction E/G: 15 Elements in 13 Groups

Coatings: Multi-layer

Angle of View: 107.11"-76.87°

Minimum Focus Dist: 1:5.26

Reproduction Ratio: 107.11"-76.87°

Focusing Mode: Internal Focusing

Zoom Mode: Rotary Zoom

Filter Size: None

Lens Width: 3.54 in. (90.0mm)

Lens Length: 5.25 in. (133.3mm)

Weight: 33.51 oz. (950g)

Accessories: None

Mounts: Canon EF