A zoom lever is a control found on cameras with zoom lenses that allows the photographer to adjust the focal length. It may be a rocker, a pair of buttons, or a lever, and can be used while looking through the viewfinder to select the desired angle of view.
Photographers use zoom levers to quickly and smoothly change composition without switching lenses. Understanding how to use a zoom lever helps in capturing dynamic scenes, maintaining framing, and working efficiently in both still and video photography.