The Tokina Cinema Vista 16-28mm II T3.0 with a PL mount and focus scales marked in feet is a wide-angle zoom lens that covers full-frame sensors and is designed to provide sharp images even when recording images at 8K resolution. Featuring a parfocal design and a T3.0 aperture throughout its zoom range, the lens holds focus throughout the zoom range and does not ramp exposure as you get to the extremes of the zoom range. The lens design also reduces the breathing and image shift sometimes encountered while zooming and focusing. It uses aspherical elements and super-low dispersion glass in its optical design for optimal color correction and minimal distortion.