New Silent DC Motor with GMR Sensor

The 16-28 f/2.8 lens uses a new silent DC motor that allows the lens to focus faster and quieter compared to previous generations. The DC motor, combined with the new magnetic GMR AF sensor, work together to increase autofocus speed.

Aspherical and Super-low Dispersion Glass Elements

A new, 56mm diameter, large aspherical glass element has been incorporated into the front lens group, while there are 2 more aspherical elements in the rear group. 3 super-low dispersion glass elements have also been incorporated throughout the optical design to reduce chromatic aberrations, provide maximum resolution, more uniform brightness, and distortion correction.

One-Touch Focus Clutch Mechanism

Tokina's exclusive One-touch Focus Clutch mechanism allows the photographer to switch between AF and MF simply by pulling the focus ring forward for AF and towards the camera for manual focus. There is no need to change the AF/MF switch on Nikon* bodies and there is no second AF/MF switch on the lens for Canon, everything is achieved through the focus ring.