Abstract: A device for controlling the firing of one or more electronic flash units by a leaf type camera shutter. Flash synchonization is provided by switch selectible modes at shutter opening, at shutter closing, or with a plurality of electronic flash units, at both shutter opening and shutter closing. The flash fire control system for leaf shutter cameras makes possible a wide variety of photographic lighting effects and can be incorporated in a shutter mechanism, camera body, electronic flash unit or flash remote controller or configured as a self-contained accessory device.

Abstract: A device for controlling the surge of electrical current demanded following the discharge of a lighting system comprised of multiple electronic flash units powered from a common source. Individual electronic flash units are re-charged sequentially by the invention after system discharge, thus limiting the current demand to approximately the level produced by a single strobe light apparatus. The power management device for large electronic flash units can be integrated into the circuits of a strobe light apparatus, a generator, inverter or battery pack itself, or it can be configured as a self-contained accessory device.