The 18mm T1.5 Vista Cinema Prime Lens from Tokina with a PL mount and with focus scales marked in feet, provides an image circle that more than covers It provides an image circle that more than covers full-frame sensors and is designed to provide sharp images even when recording images at 8K resolution. It features a maximum T-stop of 1.5, useful when shooting in low light situations or when you want to capture the shallow depth of field look. The 9-bladed iris provides round out of focus highlights for a natural-looking bokeh. The lens features a PL mount and the front of the lens is 114mm in diameter.