A camera includes a lens unit and an imaging unit. The optical axis of the camera is defined as a reference line, and a central line of a shooting area including an object to be shot is defined as an imaging centerline. A shift lens is moved to a shift-lens position which corresponds to the count of pulses supplied to a servomotor of a pan/tilter, so that an object image travels along an optical path generated by the shift lens is incident on another lens, and is then incident on the imaging unit. Accordingly, the object image incident on the imaging unit does not change while the shift lens is moved.