Runco VideoXtreme VX-3000 Operation Manual page 66

Installation
Adjusting the Yaw: Loosen the Yaw/Z-Adjustment Knobs to allow the lens to pivot freely
from side to side. Then, angle the lens to even out any left-right pincushion distortion:
Anamorphic Lens (Top View)
Correct Position
Wrong Position
Once the proper lens angle has been set, firmly tighten the Yaw/Z-Adjustment Knobs to
secure the lens in place.
52 VX-3000 Installation/Operation Manual