Varizoom VZ-PG-C20 ZoomControl Pistol Grip Control for Canon 20-Pin Lenses

With a dual-variable zoom circuit, record button, and one-touch autofocus feature, as well as an ergonomic grip and locking swivel clamp, VariZoom's VZPGC20 pistol-grip zoom control is loaded with useful functions.

This servo lens accessory is intended for Canon CN-E 18-80mm and 70-200mm 20-pin lenses and provides remote zoom, record and One-Shot Autofocus, along with a unique offset swivel clamp for adjusting the angle of operation.The pistol-grip design allows left- or right-handed operation and the VZPGC20 features a dual-variable system for versatile, precise control of zoom speed.

Just set the maximum desired speed on the dial (located in a 'trigger' position), then use the pressure-sensitive rocker to vary the speed from a crawl all the way up to the preset max.