An electric zoom camera comprises a photographing lens system having a zoom lens system, a detecting device for detecting a focal length of the photographing lens system and generating a corresponding output, a driving device for driving the photographing lens system for zooming, a commanding device for generating a command for executing zooming to the driving device, and control device for controlling the driving device in accordance with the output from the detecting device and the command, to change a focal length of the photographing lens stepwise between focal lengths of a plurality of predetermined focal lengths arranged substantially in accordance with a geometric progression.