Abstract: In a camera system arranged to communicate data between a camera and an accessory mounted on the camera in synchronism with a clock signal, the lens communicates data to the camera by a first communication method (an open drain method), and, if it is determined as a result of the data communication that the lens mounted on the camera is a lens suited for high-speed communication, the first communication method is switched to a second communication method suited for high-speed communication, so that communication can be performed at a high speed.

Abstract: A camera having an autofocus apparatus for multi-spot focus detection. Particularly, a camera is provided in such an arrangement that selection operation members for selecting an arbitrary area from a plurality of focus detection areas by a manual operation are provided at positions where a photographer can operate it readily with a finger while holding the camera in a lateral posture or in a vertical posture and that selection information selected through one operation member out of the above two operation members depending upon a holding condition of the camera, is validated, thereby improving the operability.

Abstract: The present invention relates to a flash photographing system for, in a case where the same subject of the photographing operation is repeatedly flash-photographed, performing an automatic bracket photographing operation such that the quantity of flash light to be emitted at each operation is sequentially shifted by a predetermined quantity. According to the present invention, there is provided a system of the foregoing type having a structure such that previous light emission is performed to receive light reflected from an object, and the quantity of emitted light received until the quantity of reflected light reaches a predetermined value is stored as a reference light quantity. When the quantity of light to be emitted in each main light emission operation is controlled, the quantity of light in each main light emission operation is monitored so as to subject the monitored quantity of light and the reference data to a comparison.

Abstract: A camera includes a display device for displaying a time period extending from a time when a red-eye phenomenon preventing light is emitted to a time when a red-eye phenomenon preventing exposure operation can be performed, changing a display form.

Abstract: A camera with a built-in or removable, zoom flash unit having an illumination angle that varies automatically in accordance with the focal length of a photographic zoom lens that is attached to the camera. The camera inhibits the shutter release until the illumination angle of the zoom flash unit has reached a value corresponding with the focal length selected for the zoom lens.

Abstract: A camera includes a signal input circuit mounted in a back cover, a processing circuit receptive of signals from the signal input circuit for processing camera information, a control circuit operating with selection of exposure modes, and a circuit for changing over kinds of camera information to be input by the signal input circuit in accordance with the selected one of the modes.

Abstract: A camera having a red-eye phenomenon preventing emission device, the camera comprising, a shutter having a leading curtain and a trailing curtain, a flash unit capable of flashing in a range of time between immediately after a completion of a running of the leading curtain to immediately before a start of a running of the trailing curtain, and emission control means which disables the red-eye phenomenon preventing emission device when the flash unit is set for flashing immediately before the start of a running of the trailing curtain.

Abstract: A camera has an arrangement which includes a strobe as a built-in part or to which the strobe can be detachably secured, the strobe being arranged to move to up and down positions. The camera is provided with a strobe operating device for moving the strobe from the up position to the down position, a selecting switch for selecting single shooting and continuous shooting, and a controlling arrangement. The controlling arrangement actuates the strobe operating device to move the strobe to the down position after the completion of photography when the single shooting is selected by the selecting switch. When the continuous shooting is selected by the selecting means and while the camera is continuing a photographic operation, the controlling means maintains the strobe at the up position without actuating the strobe operating means even after the completion of photography.

Abstract: A camera with an auto-focus device and having a first mode for causing the auto-focus device to perform focusing upon operation of a second operating member independently of a release operation member and a second mode for causing the auto-focus device to perform focusing upon operation of the release operation member and interrupting focusing of the auto-focus device upon operation of the second operation member.

Abstract: A camera employing a multi-photometric method of repeatedly performing a light measuring operation every time an operation member is operated to determine an exposure value on the basis of every measured value of light thus obtained is arranged to display the value of light measured by each of performances of the multiple light measuring operation in such a mark that indicates which of the performances is represented by the display mark.

Abstract: A power focus device in a camera has a manually rotatively operated focus ring, a lens driving drive source for driving a focusing lens, and a pulse generating device operatively associated with the rotation of the focus ring to generate a pulse signal conforming to the amount of rotation of the focus ring. A focus ring rotation direction detecting device detects the direction of rotation of the focus ring from the pulse signal, a focus ring rotation amount detecting device detects the amount of rotation of the focus ring from the pulse signal, and a drive direction setting device sets the direction of drive of the lens driving drive source on the basis of the result of the detection in the focus ring rotation direction detecting device. A drive amount setting device memorizes the result of the detection in the focus ring rotation amount detecting device and sets the memorized value as the amount of drive of the lens driving drive source.

Abstract: An information setting device for a camera comprises a plurality of manual operation switches for setting varied kinds of information. Among these switches, when a plurality of switches are simultaneously operated, there obtains a specific setting mode for setting information of a kind different from information of other kinds to be set by individually operating these switches. In the event of thus selecting the specific setting mode, this mode remains unchanged even when at least one of the simultaneously operated switches becomes inoperative.

Abstract: In a system for setting the aperture in a camera for flash photography, a minimum aperture is computed in response to parameters such as distance to an object, stroboscopic guide number and film sensitivity. In one embodiment, a predetermined aperture value is preestablished in the system and the computed minimum aperture is compared therewith. Where the computed minimum aperture is below such predetermined aperture value, such computed minimum aperture is used in flash photography. On the other hand, when the computed minimum aperture is above such predetermined aperture value, an aperture larger than the predetermined minimum aperture value is used in flash photography. Other embodiments for flash aperture setting are also set forth.

Abstract: A camera having a detector for detecting transition from the wind to rewind mode and a control circuit responsive to the output of the detector for controlling a shutter in such a manner that the exposure aperture of the film gate is covered by both leading and trailing blade groups of the shutter just before the initiation of a film rewinding operation.

Abstract: A camera having a reading device for reading a so-called DX code pattern provided on a film container is provided with means for detecting two specific pattern parts consecutively located within the DX code pattern and for determining and indicating whether the film is contained in a film container having the DX code or whether the DX code is accurately read out.

Abstract: A changeover mechanism in the transmission of rotation of a drive source such as a reversible motor to an operating mechanism for the camera comprises a planetary clutch and is provided with a planetary changeover limiting member pivotally mounted on a common shaft of a planetary gear of the planetary clutch and frictionally connected thereto, whereby when the motor rotates in such a direction that the planetary gear engages a gear which is drivingly connected to the operating mechanism, release of the planetary gear from the engagement is inhibited, and when in the reverse direction, the planetary gear is permitted to disengage from the gear of the mechanism.

Abstract: A camera having film feed detection means the signal of which varies with the rotation of a rotary detection wheel arranged in between a spool and a film cartridge chamber to follow the rewinding movement of the film and a motorized film rewinding device which rewinds the film by means of a motor is provided with change-over means for changing, according to the output of selection means, the period of time before bringing the motor to a stop after the output of the film feed detection means ceases to vary.

Abstract: The present invention relates to a photographic information setting device having a switch arranged to turn on and off and generate digital data when a stepwise operating member changes its position, wherein the turning on and off of the switch is detected with the help of current supply to the switch to renew the digital data until a desired value of any exposure factor is preset. In the present invention, when the aforesaid stepwise operating member lies in any of click-stopped positions, the current supply to the switch is cut off to prevent wasteful consumption of electrical energy. The number of times of turning on and off of the switch is once stored in a counter, and, upon detection of turning on and off of the switch, a computer reads out the content of the counter so that the renewed digital data are formed in the interior of the computer.

Abstract: A film drive device for a camera in which the film is transported by an electric motor as the drive source, comprises detecting means for detecting that the winding of all the frames of the film is complete, manually operable switching means for forcibly changing over the film to a rewind state, and operation control means for shifting from a film windup state to the film rewind state. The operation control means makes a first operation of shifting to the film rewind state in response to the completion of the winding by the detecting means and a second operation of shifting to the film rewind state by the operation of the switching means different from each other. Therefore, an efficient shifting to the rewind state can be performed.

Abstract: A camera having film feed detection means the signal of which varies with the rotation of a rotary detection wheel arranged in between a spool and a film cartridge chamber to follow the rewinding movement of the film and a motorized film rewinding device which rewinds the film by means of a motor is provided with changeover means for changing, according to the output of selection means, the period of time before bringing the motor to a stop after the output of the film feed detection means ceases to vary.