Video camera with improved zoom capability

摘要

A video camera is operated to obtain a very rapid change in magnification. A target degree of magnification is achieved by rapid change in an electronic zoom factor provided by an image signal processing circuit. Either before or after the change in electronic zoom factor, simultaneous off-setting changes are carried out in the electronic zoom factor and in a mechanical zoom factor provided by the camera's optical system. The simultaneous off-setting changes in the two zoom factors occur at a rate consistent with practical operation of the mechanical drive components for the camera's optical system.