Abstract: A control system comprises a reset unit for outputting a reset output by the manipulation of a manually operable member, a first microcomputer adapted to be reset by the reset output, a second microcomputer, and a controller for deactivating the second microcomputer. The controller deactivates the second microcomputer in accordance with the outputs of the first microcomputer and the second microcomputer. When there is no output from the second microcomputer, the controller deactivates the second microcomputer in response to the output of the first microcomputer determining no response from the second microcomputer.

Abstract: A camera on which warnings of serious content and warnings of relatively insignificant content are organized and displayed, and on which warning contents are easily understandable, even to an inexperienced photographer. When a condition requiring a warning is detected as a result of camera monitoring, a camera controller performs a procedure that displays an appropriate warning on the display device. If the warning content concerns a condition that has been determined in advance to be serious, the warning is displayed without regard to the current display content. If the warning concerns a condition that is relatively insignificant, the warning is displayed only in conditions in which specific functions have been selected.

Abstract: In a camera system consisting of a main camera body and an accessory mountable thereon, the camera body includes an output device for releasing a variable signal in response to an external operation, a main body communication device capable of communicating with the accessory, and an identification device for identifying the content of a signal transmitted from the accessory through the main body communication device; while the accessory includes an operation device for releasing an operation signal in response to an external operation, and an accessory communication device capable of communicating with the camera body, wherein, when the identification device identifies the operation signal released from the operation device, the transmission of the variable signal from the camera body to the accessory is permitted and the information setting in the accessory is executed according to the variable signal, but, when the identification device does not identify any operation signal, the information setting in the

Abstract: A control system comprises a reset unit for outputting a reset output by the manipulation of a manually operable member, a first microcomputer adapted to be reset by the reset output, a second microcomputer, and a controller for deactivating the second microcomputer. The controller deactivates the second microcomputer in accordance with the outputs of the first microcomputer and the second microcomputer. When there is no output from the second microcomputer, the controller deactivates the second microcomputer in response to the output of the first microcomputer determining no response from the second microcomputer.

Abstract: A camera capable of slow synchro photographing comprises a shutter speed setting mode changeover device for changing over a shutter speed manual setting mode and a shutter speed auto setting mode; a shutter speed restricting device for performing a restriction during the shutter speed auto setting mode to set the shutter speed lower than a slowest shutter speed, i.e.

Abstract: A camera comprising E.sup.2 PROM storing therein writing data for check sum and a plurality of adjustment data for compensating the control value of the camera to control the camera properly, and capable of electrically rewriting the data and holding the rewritten data still after a power source switch is opened, a comparator for finding the sum total of the writing data for check sum and the adjustment data in response to the closing of the power source switch and comparing the sum total with a predetermined value, and a monitoring device for effecting at least one of warning and release inhibition when the result of the comparison by the comparator is that the sum total is not equal to the predetermined value.

Abstract: An information setting apparatus in a camera is provided with a selecting operation device having a plurality of operating portions operated to select one of a plurality of functions when the set values of the plurality of functions are to be changed, a changing operation device operated to change the set value of the selected function, a resetting operation device having an operating portion for resetting all of the set values of the plurality of functions to a predetermined standard value, and individual function resetting device for resetting only the selected function to the predetermined standard value when one of the operating portions of the selecting operation device and the resetting operation device are operated together.

Abstract: A camera comprises a penta-roof prism, a plurality of inclined sensors respectively disposed at positions opposed to corresponding inclined planes of the prism, and an attitude detector for detecting the attitude of the camera in response to outputs of the sensors. Each sensor is capable of producing either of two outputs, and the outputs of the sensors are combined to produce a number of pieces of attitude information. This information is classified to provide a smaller number of pieces of attitude information from which the attitude of the camera is determined.

Abstract: An accessory which is mountable on a camera having film frame count data communication capability, and which can print film frame count data on a film surface comprises a detector for detecting a photographing signal generated with each photographing operation of the camera, a data reception device for receiving film frame count data from the camera by communication with the camera; and a storage device for storing film frame count data based on film frame count data received from the camera. When the detector detects the photographing signal, the storage device increments film frame count data stored therein by a value corresponding to one frame, and when the data reception device receives film frame count data from the camera, the storage device stores the received film frame count data in place of the film frame count data presently stored therein.

Abstract: A camera which can execute data communication with an attached accessory that can perform a data printing operation wherein data received from the camera is printed on a film surface comprises a release device for generating a release signal for starting a photographing operation, a transmission device for transmitting data to the accessory during a time interval from the end of a photographing operation to be beginning of a next photographing operation, and a control device for enabling the photographing operation after intervening data transmission by the transmission device when the accessory is to perform the data printing operation, and for enabling the photographing operation without intervening data transmission by the transmission device when the accessory is not to perform the data printing operation.

Abstract: There is disclosed a camera system consisting of accessories such as a speed light, a data back etc. and a camera capable of mounting these accessories, and capable of data communication between the camera and the accessory. When the power supply of the camera is turned off, a power supply activating signal is sent as a hardware signal from the accessory to the camera by the manipulation of the accessory. When the power supply of the camera is turned on, a power supply extending signal is sent as a software signal from the accessory to the camera by the manipulation of the accessory. The camera holds the operation of the power supply for a predetermined period from the latest entry of the power supply activation signal or the power supply extending signal.

Abstract: A camera which can receive an accessory for performing a data printing operation on a film surface and can execute data communication with the accessory is disclosed. The camera has a means for identifying whether or not communication is attained between the camera and the accessory and a means for transmitting a printing signal for causing the accessory to start the data printing operation from the camera to the accessory within a predetermined period of time. The transmission means changes a transmission time of the printing signal in accordance with the identification result of the identification means.

Abstract: A camera is adapted so that a light emission level of a flashing apparatus is automatically corrected through the comparison of the control value with the appropriate exposure for the constant illumination (background illumination). As a result, an appropriate exposure can be given for the principal object, such as a person, even when the exposure for the constant illumination is outside the exposure control range or is intentionally decreased or increased.

Abstract: A camera which can receive an accessory for performing a data printing operation on a film surface and can execute data communicating with the accessory is disclosed. The camera has a means for identifying whether or not communication is attained between the camera and the accessory and a means for transmitting a printing signal for causing the accessory to start the data printing operation from the camera to the accessory within a predetermined period of time. The transmission means changes a transmission time of the printing signal in accordance with the identification result of the identification means.

Abstract: A camera capable of restarting the bracketing exposure mode even after all the frames of a film have been exposed during the bracketing exposure mode. An output derived from detector for detecting the trailing end of a film is delivered to controller which controls the arithmetic operation for obtaining an optimum exposure value as well as the bracketing exposure so that in response to the above-stated output, the controller inhibits the shutter release after the end of the film, but maintains the bracketing exposure mode. Furthermore, the remaining exposures of a predetermined number of exposures in the bracketing exposure mode are cancelled at the end of the film.

Abstract: A single-reflex camera is provided with a movable mirror provided on a photographing optical path; a driver circuit connected to an electrical motor so as to drive the movable mirro, the driver circuit being arranged to cause the movable mirror to move out of the photographing optical path in a first cycle of driving prior to exposure and to cause the movable mirror to move onto the photographing optical path in a second cycle of driving following the first cycle of driving; a photometer circuit arranged to receive a portion of the light flux which passes through the photographing optical path and which is incident upon the movable mirror and then to generate information concerning the brightness of an object; a first timer circuit for counting the time period required for the first cycle of driving of the driver; and a second timer circuit for determining, on the basis of the required time period counted by the first timer circuit; the time interval between the starting of the first cycle of driving of the d

Abstract: Camera system having a camera body and an accessory detachably mounted thereon. The camera body and accessory are provided with terminals for transmitting information data signals therebetween. The information data stored in a memory in the accessory is transmitted to the camera body in a selected mode responsive to a command data signal output from the camera body. In a first mode all information data is transmitted in a second mode part of the information data is transmitted.

Abstract: A camera system has electrical contacts consisting of a first terminal for initiating data exchange between an interchangeable lens and a camera body, a second terminal for a common clock signal, a third terminal for common exchange of serial data, and a fourth terminal for initiating data exchange between the camera body and an intermediate accessory. The electrical contacts are used for data exchange between the camera body and the interchangeable lens or the intermediate accessory.

Abstract: In a camera a field to be photographed is divided into a plurality of metering sections which produce a plurality of metering outputs, respectively. The metering outputs are processed to produce a value corresponding to a desired proper brightness value in order to control exposure in the camera. The type of lens mounted on the camera body is discriminated, and the information thus obtained is used for changing the photometry processing. A focal length detector produces a focal length signal which changes with the focal length of the phototaking lens. A teleconverter detector detects that a conversion lens is mounted on the camera body and produces a detection signal. Photometry processing is placed in a high speed mode in response to the detection signal, irrespective of the focal length of the phototaking lens mounted on the camera body.

Abstract: A camera body is constructed in a manner that two different types of AF lenses can be detachably attached thereto and the camera body can properly operate these types of AF lenses.The camera body detects the type of the attached one of the AF lenses and generates a corresponding detection signal according to a detection result.In addition, the camera body is designed to selectively generate at least two different voltages according to the detection result.