Abstract: An electronic flash apparatus provided with a main flash apparatus having a first flash discharge tube and a sub-flash apparatus having a second flash discharge tube. The sub-flash apparatus is attached to the top of the main flash apparatus so that it may be rotated in horizontal and vertical directions.

Abstract: An electronic flash apparatus for a camera is provided with a main discharge capacitor, a charging means for charging the capacitor, a flash discharge tube which radiates light through the discharge of a charge stored in the capacitor, and a display section for displaying an exposure condition at the time of photograph. The display section includes a display portion for displaying an F-number corresponding to a film sensitivity, a portion for displaying a plurality of photographable distances corresponding to a charged voltage across the capacitor and the F-number and a charged voltage discriminating circuit having a plurality of light emission elements for successively and stepwisely emitting light as the charged voltage across the capacitor increases.

Abstract: A flashing system for an electronic flashing apparatus comprises a camera including a switch adapted to be closed in response to shutter releasing and an electronic flashing apparatus including a light-sensitive element, a trigger circuit actuated when the light-sensitive element is rendered conductive and a flashing element adapted to emit flash light when the trigger circuit is actuated. The system further comprises a connector including an optical fiber bundle and connected between the camera and electronic flashing apparatus. The connector also includes a plug portion detachably connected to the camera and including a light emitting diode which emits a light in response to the shutter releasing. The optical fiber bundle transmits the light to the electronic flashing apparatus for irradiating the light-sensitive element and making it conductive. Thus, the flashing element is rendered to flash. In this way, the electronic flashing apparatus is operated without using any electric connector.

Abstract: An electronic flash apparatus capable of flash-photographing by means of an electronic flash discharge tube and a flash lamp. The electronic flash apparatus is so constructed that a sub-flash apparatus with a flash lamp may be removably attached thereto. When the flash discharge tube built in the electronic flash apparatus is triggered by a trigger circuit to flash, the flash lamp of the sub-flash apparatus is at the same time triggered to flash.

Abstract: An electronic flash apparatus comprises a discharge circuit and termination circuit for terminating the discharge circuit. The discharge circuit comprises an energy storage capacitor and a series circuit formed of a flash tube and a first switching element connected in parallel to the energy storage capacitor. The first switching element is rendered inoperative by a reverse voltage which is temporarily supplied when energy stored in a commutation capacitor of the termination circuit is discharged by a second switching element. When a prescribed period of time has passed after the first switching element is turned off, the switching element is again put into operation by a retrigger circuit. The commutation capacitor is reversely charged through the flash tube after the first switching element is turned off. The reverse charge is discharged by the retrigger of the first switching element.

Abstract: An adapter for electronic flash apparatus comprises a pair of first external connection terminals detachably connected to high tension pulse takeout terminals of a camera incorporating means for generating the high tension pulse in response to the action of the shutter of the camera; and a pair of second external connection terminals detachably connected to a pair of terminals of a trigger circuit included in an electronic flash apparatus or unit which further comprises a power supply and a flash discharge lamp supplied with the power supply voltage and in which the trigger circuit is supplied with the supply voltage between the trigger circuit terminals to start the flash discharge lamp when the pair of terminals of the trigger circuit is short circuited.