The Tokina AT-X 16-28mm f/2.8 PRO FX 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.

Aspherical and Super-low Dispersion glass elements

A new, 56mm in diameter, large sizes 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.

One-Touch Focus Clutch

Tokina's exclusive One-touch Focus Clutch Mechanism allows the photographer to switch between AF and MF simply by snapping the focus ring forward for AF and back toward the camera to focus manually. There is no need to change the AF/MF switch on Nikon camera bodies and there is no second AF/MF switch on the lens for Canon, everything is accomplished by the focus ring.

Specifications

Model: AT-X 16-28 F2.8 PRO FX

Series: AT-X PRO

Type Wide: Zoom

Sensor Size: Full Frame

Mount: Nikon F

Color: Black

Country of Origin: Japan

Focal Length: 16-28mm

Maximum Aperture: f/2.8

Minimum Aperture: f/22

Automatic Aperture: Yes

Angle of View: 107 -76

Minimum Focusing Distance: 0.28m

Macro Ratio: 1 : 5.26

Focusing Mode: Automatic

Manual Focusing: Ring Yes

Autofocus Switch: Clutch Ring

Focusing Type: Internal Focus

Coating: Multi-coating

Construction E/G: 15 Elements in 13 Groups

Aperture Blades: 9

Lens Hood: Built-In

Electrical Contacts: Yes

Dimensions: 90x133 mm

Weight: 950g

What's in the box
Front Lens Cap
Instructions Manual
Rear Lens Cap
Warranty Sheet
Warranty 2 Year Limited Warranty