Built to last a lifetime, the PG-L Lanc Lens Zoom Camera Control is the compact, pistol-grip version of the Pro-L. Utilizing the same electronics as the Pro-L and in production nearly as long, choose the PG-L over the Pro-L if you want the flexibility of operating left- or right-handed, or if you simply want a more compact pro controller. The rocker acts as an on-off switch for zooming to wide or telephoto, while the speed dial controls the speed of the zoom either as a preset or you can roll the dial with your index finger to increase or decrease the speed while zooming.