A lens shutter has a diaphragm blade, a shutter blade, and a motor with a rotor
reciprocatingly turned between an initial position and a final position by a current
applied to a coil, to move the diaphragm blade to stop at an aperture regulating
position and the shutter blade between an aperture open position and an aperture
close position in cooperation with a first forcing member urging the diaphragm
blade toward the aperture regulating position, a stopper for keeping the diaphragm
blade at the aperture regulating position and a second forcing member urging the
rotor against movement for the final position at least after the diaphragm blade
abuts on the stopper. A magnetic device is provided to keep the rotor at positions
where the aperture is fully opened and closed, respectively, even when the current
to the coil is interrupted.
