Canon Kabushiki Kaisha

Syohei Ohtaki

Zenzo Nakamura

Tadashi Ito

Tokuichi Tsunekawa

Takashi Uchiyama

Hiroshi Aizawa

Takehiko Kiyohara

Soichi Nakamoto

Youichi Okuno

Kiyoshi Takahashi

Keiko Kondo

Taizo Mitani

Tomoaki Kawamura

Mithutoshi Ogiso

A photographic data recording device for a camera for photographically recording some data on film together with a photographic image. The device includes a capacitor, a charging circuit for the capacitor which responds to the release of the shutter for commencing charging and an electronic flash device operating in response to the capacitor discharge to illuminate the data. A control device automatically causes the capacitor to discharge electricity to allow the electronic flash device to emit a flash when the charge of the capacitor reaches a preset level of potential and which prevents the capacitor from discharging when the charge is below the preset level of potential. A display lamp may be utilized to indicate when the charged voltage of the capacitor reaches a preset level.

Data printer for a camera

The present invention relates to a safety device for exposure amount control equipment consisting of a camera and an electronic flash device, including a detecting circuit for detecting the charge voltage of the storage capacitor of the electronic flash device and the voltage of the power source and producing two different electrical signals in accordance with the detected voltages so as to prevent flash light photography with improper exposure amount and a lock member for preventing the movement of a shutter release mechanism of the camera in accordance with the electrical signal produced in the detecting circuit when the detected voltages are lower than a certain determined value.

Safety device for an exposure amount control equipment

An electronic flash apparatus is provided with a display element positioned in the view-finder of a photographic camera so that the operator is immediately aware if the flash tube has been fired in response to the closure of the synchronous switch. The light emitting operation of this display element is controlled by use of a signal generator arranged to be responsive to the occurrence of discharge through the flash tube of the flash apparatus. With this apparatus, therefore, the operator may rely upon the appearance of this display element to insure that the firing is effected by the flash apparatus even when the object-to-camera distance is relatively small.

Indicator circuit for electronic flash apparatus

In the photographic apparatus disclosed a long-exposure adapter is attached to a camera to lengthen the camera's shutter operating times. When the camera's light sensing system responds to a low illumination by setting the shutter time to B (infinite time), an operator shifts to the long exposure range. The adapter then responds to a high sensitivity sensor and a long exposure timing device in the adapter is adjusted for the low illumination. The adapter then operates the shutter release of the camera, which has been set to B to obtain long exposures.

Photographing apparatus

A camera data recording device having an indication means comprising solid-state illuminating element on the back plate of the camera, connected to a control device provided outside the camera by means of a connector, in which various data are selected and set by the control device.

Device for recording camera data

Growing community of inventors

Yokohama, Japan

Syohei Ohtaki