A lens unit being connected to the camera unit and being selectively set either
in a mode in which control is effected according to a control signal from the lens
unit or in a mode in which control is effected according to a control signal from
the camera unit, wherein when a signal for setting of mode is not input from the
camera unit with a lapse of a predetermined time or more after power on of the
power supply, a setting circuit sets the mode in which control is effected according
to the control signal from the lens unit.
