Abstract: As for a camera, a method for driving an electronic shutter of a camera, comprising the stages of setting an initial focus of a rotating member connected with a focus control lens in a state where the focus control lens is pre-set in a middle position between a maximum zoom position and a minimum zoom position, such that the initial position of a focus control lens is positioned in a middle step between a focus position of the focus control lens with respect to a pre-set farthest subject and a focus position of the focus control lens with respect to closest subject; controlling focus by rotating the rotating member connected to a first driving means from an initial position to a clockwise or counterclockwise direction, in order to move the focus control lens to a position set according to a value calculated by a distance measuring means when a shutter switch is operated; and performing exposure by sector opening/closing means being operated according to an exposure value calculated by a luminescent measuring

Abstract: A shutter driving system for a camera including a motor gear, an automatic exposing gear, an opening lever, an automatic focusing gear, an automatic focusing ring, and a locking member. The system controls the locking member for accurate automatic focusing.

Abstract: Disclosed is an electromagnetic lens shutter apparatus of simple construction which can be applied to a camera having an automatic exposure control function and an automatic focus control function. The electromagnetic lens shutter apparatus comprises a lens mount; at least two sheet-like lens shutter blades; an exposure adjustment ring; opening means for opening and closing the shutter blades; and a central processing unit to control the rotation of a linear pulse motor. The linear pulse motor includes a circular rotor mounted around the cylindrical portion and a plurality of stators placed around the rotor, each stator has two armatures mounted on an inner circumference thereof with a predetermined distance from the rotor. The rotor has a plurality of projections on the outer circumference thereof projected radially outwardly at regular intervals. A permanent magnet is provided between the stators.

Abstract: An aperture-priority lens shutter apparatus for a camera has a compact construction and an automatic exposure control function. The aperture-priority electromagnetic lens shutter apparatus for a camera comprises a lens mount; two lens shutter blades serving as a lens shutter and a diaphragm at the same time; a driving mechanism for driving the lens shutter blades; a button switch for setting an F number manually; a light measuring circuit for emitting a signal corresponding to the amount of light available to photograph an object; and a central processing unit including an exposure control time table in which the exposure control data are inputted, an operator for operating an exposure time in case of a semiautomatic mode and a driver for driving the driving mechanism.