Abstract: A photographing lens, which is to be mounted on a camera in an interchangeable manner is provided with a focus-informing means, which informs the photographer of focussings of the photographing lens during manual focussing operation thereof by buzzer or by small lamp, thereby enabling to provide a semi-automatic focussing for a conventional camera body without provision of an automatic focus adjusting means.

Abstract: In an electronic photographic flash apparatus comprising a DC-DC converter, a high tension capacitor, and a gas-discharge flash tube to produce a light flash by consuming electric energy stored in said high tension capacitor,the improvement is that the apparatus further comprisinga low tension capacitor and a switching circuit which connects the low tension capacitor parallel to the DC low voltage source for charging therein at an off-state of the apparatus, and connects the low tension capacitor in series to the DC low voltage source in a subsequent stand-by period thereby to boost the operation of the DC-DC converter at an initial stage in the waiting time when the power switch is on, so as to quickly charge up the high tension capacitor.

Abstract: An operation indicator for an automatic flashing device comprising a first indication means which visually indicates a reaching to a predetermined voltage of main capacitor and readiness for proper completion of flashing of an automatic light adjusting, and a second indication means which indicates a selected one of them by sound, and a switching means which connects or disconnects said second indication means to the circuit of the device.By the abovementioned construction, the user can realize readiness of automatic flash operation both by eyesight and by audition.

Abstract: A flash camera having features that an aperture control is made in accordance with the factors whether a film sensitivity is high or low and besides whether a flash apparatus is used, that a constant-voltage circuit of small power consumption is employed thereby enabling to flow current to a meter either continuously or before a photographing and to be free from exposure errors arising from a damping movement of a pointer of the meter and so on, and that an operation of the constant-voltage circuit is controlled by a change-over switch to compensate light intensity variations of a strobe apparatus when power source voltage varies.

Abstract: Instant-printing film further comprises a magnetic sound-recording band on one end part thereof, and is installed in an instant-printing camera which has a sweeping magnetic recording/reproducing head that sweeps touching and along the magnetic sound recording band, thereby enables recording of ambient sound of the photographic scenery, or reproducing of the recorded sound while seeing the instant-printed photography.

Abstract: A photo-detection adapter for an automatic strobe comprising a mounting means attachable to a barrel of a photographic lens, an external photo-detection part supported by the mounting means so as to change a detection direction for properly receiving a reflection light from a photographic object, a light conduction means for conducting the reflection light from the photographic object to a photo-detection element disposed in the strobe, and a coupling means for holding the output end of the light conduction means so as to face to the photo-detection element in the strobe.

Abstract: In a camera equipped with both a standard lens and a telephoto lens which may be arbitrarily selected for exposures by manipulating a first control knob, a focusing device is provided which selects the focusing ranges or depths of field of the telephoto lens by a second control knob only in the case of the photography with the telephoto lens.

Abstract: A photographic flash device comprising a main capacitor for flashing a flash discharge tube, a DC-DC converter, a constant-voltage circuit for controlling the oscillation function of the DC-DC converter and an indication means capable of discriminatively indicating states of the voltage of the main capacitor in three different voltage ranges, first range being from zero to a first predetermined voltage above which flashing is possible, second range being from a first predetermined voltage to a second predetermined voltage, the third range being from the second predetermined voltage to a third predetermined maximum voltage, respectively.

Abstract: A photographic camera including an electronic flash apparatus as well as a radio receiver, particularly a radio-receiver-built-in flash camera being provided with indication means capable of indicating both the state of the readiness for flashing of the electronic flash apparatus and the state of the tuning of the radio receiver.

Abstract: In a light angle indicator of photographic flash having a main part containing at least a flash lamp and a front lens part slidably coupled to said main part, the improvement is thatthe light angle indicator comprisesa first indicator panel fixed to said main part and having obliquely disposed transparent regions or windows anda second indicator panel fixed to said front lens part and having obliquely disposed bright marked regionseither of said windows or said bright marked regions having marks or numerals to indicate light coverage angles.

Abstract: A distance indication arrangement for a photographic camera includes a plate having a plurality of numerals or symbolic marks thereon representing distances from the camera to the object being photographed. A multi-position switch is provided which is operable independently of the shutter releasing mechanism of the camera to selectively feed current to illumination elements associated with the numerals or marks. In accordance with the position of the switch, an individual numeral or mark is illuminated.

Abstract: A photographic flash device comprising a first mechanism for varying the angle of divergence of a flashed light and a second mechanism for varying the direction of the flashed light. The first variable mechanism is provided with a first body having a light source, a second body, a first slidable molding which has an optical panel to cover the front of the light source, a second slidable molding which surrounds the first slidable molding, and detent means which control slide movement of the first slidable molding and connects the first slidable molding with the first body. The second variable mechanism changes the direction of the flashed light from the light source by rotatably connecting the moldings to an additional body.

Abstract: An electronic flash of the type incorporating the so-called variable guide number device or a flash duration control device for controlling the quantity of a flash of light emitted from a flash lamp. In an integrating circuit of the variable guide number device diodes are used so that their forward bias characteristics may be utilized for the accurate control of a flash duration.

Abstract: A camera is provided with a flash device and a selectively engagable lens adjusting arrangement such as a telescopic conversion lens. A view finder angle adjusting mechanism such as a periphery masking frame is provided and is connected through a linkage to the lens adjusting arrangement, so that a view finder angle corresponding to the angle of the lens being used is provided. The camera includes a beam angle adjusting means such as a Fresnel lens associated with the flash device, so that the beam angle of light from the flash device can be adjusted to correspond to the angle of the lens being used.

Abstract: In a photographic flash device comprising a flash discharge tube, for example a xenon discharge tube, a main capacitor which is connected across electrodes of said flash discharge tube and is for storing electric charge to be discharged in said flash tube, a triggering capacitor which is connected in series with a primary coil of a triggering transformer and a synchronous switch, and a voltage indicating glow discharge lamp for indicating completion of charging in the main capacitor.A safety circuit for prohibiting accidental flashing is constituted by comprising a switching means which suspends function of said triggering capacitor.

Abstract: In a flash camera having a zone-focusing system and an electronic flash device in one united body, wherein the flash camera comprises an electro-luminescence device for emitting light by AC output fed from a DC-DC converter circuit in the electronic flash device, an indicator having symbol marks for indicating an object distance and illuminated by the electro-luminescence device, and a pointer, linked to a focus-adjusting device for adjusting focus of the main photographic lens of the camera, for pointing the symbol marks on the indicator. The symbol marks can be easily identified through the illumination by the electro-luminescence device and further a voltage decrease of power source battery in the DC-DC converter circuit can be easily and clearly observed.

Abstract: A photographic flash device comprisingA flash tube disposed in a case and a converging lens disposed in front of the flash tube, the improvement is thatThe converging lens is mounted on the front part of a slidable frame which slidably and permanently engages with the case at the front part thereof in a manner to enable adjustment of distance between the converging lens and said flash tube so as to change angle of divergence of flashed light, and a space inside the frame is covered by a protecting cover.

Abstract: The adaptor is used as a means which exchangeably installs an optical supplementary means such as panels or filters in order to effectively take the photograph with a photographic flash device, the adaptor comprising a mounting part which has convex or indent parts for coupling with indent or convex parts on the body of the photographic flash device, an installing frame for installing optical supplementary means therein, and a pyramid-shaped hood part which connects the installing part with the mounting part.

Abstract: A combined device of photographic camera device and an electronic flash device in which a charged energy in a main discharge capacitor is consumed by a flash discharge tube to emit flash light, comprises a switch mechanism linked to a shutter button to be turned on by the actuation of the shutter button to allow the feed of a power supply to the main discharging capacitor, and a further switching circuit operative when a brightness detected by a brightness sensing circuit is low to activate a holding circuit for maintaining the switch mechanism in its on state and deactivate the holding circuit when a predetermined charge has been stored in the main discharging capacitor.

Abstract: In an automatic film advancing system for a small sized camera, a breaking-off of undesirable overload current of a film advancing motor at the end of the film or at an accidental stop of the film advancing can be made by providing in the system:A switching circuit which connects the motor to a power source in response to a closing of a shutter after a photographing, andA detector circuit which produces a signal to cause said switching circuit to break off the feeding of said current when the current continues longer than a preset length of time.