Abstract: A camera which prevents an invading body from being photographed and yet prevents a self-timer photographing time from being prolonged wastefully. The camera includes a distance measuring device for detecting object distances, a photo-taking device for effecting photo-taking and an angle of field switching device for switching the angle of field of a photo-taking lens in conformity with ON or OFF switches that are connected to a controller for carrying out a self-timer photographing process. During self-timer operation, the time counting of a main timer is started and object distance is repetitively measured. When object distances vary, time counting by the main timer is interrupted and an auxiliary timer is actuated so that self-timer photographing time is prolonged by the time set by the auxiliary timer. After the termination of time counting by the auxiliary timer, time counting by the main timer is restarted.

Abstract: An automatic exposure control device for use with a camera having a continuous shooting mode includes, but is not limited to, a photometric unit measuring subject brightness, an exposure control unit controlling the automatic exposure control device according to the operation of the photometric unit, a range finding unit detecting subject distance, a focus control unit focusing a lens of the camera according to the operation of the range finding unit, a mirror raising unit raising a mirror of the camera and a timer timing the time from a start of a shutter release operation of the camera until the completion of a mirror raising operation by the mirror raising unit.

Abstract: A camera with a line-of-sight detecting device, having a light source illuminating an eye of a photographer with light; a conversion device converting reflected light from the illuminated eye to an output corresponding to the intensity of the reflected light; and an eye gazing point determination system identifying an eye-gazing point of the photographer when an output difference or an output ratio between a peak output and a background output of the conversion device is greater than a predetermined value and when the magnitude of a peak output from the conversion device is within a predetermined range.

Abstract: A compact camera apparatus having an improved display device and circuit mounting board layout within the camera body in relationship to other components to achieve a more compact and efficient space camera utilization. In one embodiment of the camera, a display unit is located on the upper surface of the camera body, and has a portion thereof, such as its drive mechanism at least partially positioned in a space formed between a light projection unit and light receiving of the camera's rangefinder device. In another embodiment, the camera has a mounting board of the required size for holding constituent control circuit components of the camera located in the camera body with attention to the location of the board in relationship to the cartridge compartment and other camera components to provide for a more compact design.

Abstract: A visual axis detection apparatus including a correction data storage section to store the correction data to correct errors in the detected visual information; an individual variation correction data detection system to detect the individual variation data related to the visual axis of an observer; a correction data updating section to update the correction data on the basis of the new individual variation data detected by the individual variation detection system and the correction data stored in the correction data storage section; and a visual axis correction section to correct the detected visual axis by use of the correction data updated by the correction data updating section and stored in the correction data storage section. The apparatus adds a weight to the already stored correction data in accordance with the individual variation data when obtaining individual variation data anew, and uses this weighted data as the correction data.

Abstract: A method and system for light beam communication between a camera and a computer is provided by adapting an existing light beam auto-focus system of a conventional automated camera, such as a conventional automated film-based camera or a conventional automated electronic camera, and by adapting a conventional computer to provide a light beam communication linkage with the adapted camera. The light beam auto-focus system of such automated cameras is modified to include a mode selector providing a selection of the conventional light beam auto-focus mode and alternatively for selection of a light beam communication mode. The camera has a microprocessor and an erasable electrically programmable read-only memory (EEPROM). In the light beam communication mode, a light beam emitter driver circuit and a light beam sensor timing circuit and signal processor are provided.

Abstract: A variable focal length optical system includes a first lens unit (G1) having a positive refractive power and arranged to be closest to an object, a final lens unit (Gb) having a negative refractive power and arranged to be closest to an image, the first lens unit (G1) and the final lens unit (Gb) moving to the object side when a focal length of an entire lens system changes from a smallest focal length state to a largest focal length state, and an aperture stop arranged on an image side of the first lens unit (G1) and on an object side of the final lens unit (Gb), wherein the variable focal length optical system satisfies the following conditions:0.25<.vertline.fb.vertline./f1<0.450.7<M1/f1<0.90.4<.vertline.fb.vertline./Mb<0.5D/fw<0.7.

Abstract: An interchangeable lens camera including an interchangeable lens having a photographic optical system, a lens mount to mount the interchangeable lens, a lens side communication terminal to communicate, a storage circuit to store lens data representing an optical property of the photographic optical system of the interchangeable lens, and a lens side communication device to transmit the lens data stored in the storage circuit through the lens side communication terminal, and a camera body having a body mount engageable with the lens mount to mount the interchangeable lens on the camera body, a sensor to receive light from a field through the photographic optical system and to generate an output corresponding to the light received, a processing circuit to process the output generated from the sensor and to output a condition signal, based on the processed output, indicating a condition of a subject image formed by the photographic optical system, a body side communication terminal connected to the lens side com

Abstract: A film feeding cessation adjusting device for cameras is capable of accurately stopping to a predetermined stopping position each frame of a film having a minimum number of perforations in order to ensure a sufficient data recording area. The film feeding cessation adjusting device includes a film feeding device for feeding a film, a perforation detection device for detecting a perforation of the film, a timer device for measuring a time required for film feeding, a stopping signal generating device for obtaining a time which is delayed by a predetermined period from the time at which the perforation detection device detects the perforation, on the basis of the results of the measurement of the timer device, and for generating a feeding stopping signal at the obtained time, and a control device for stopping film feeding of the film feeding device when it receives the feeding stopping signal.

Abstract: In representing a depth of field in a camera, the depth of field is displayed on the basis of the magnitude of a field depth feeling Df which corresponds to human feeling. The field depth feeling Df is obtained by processing at least one of a depth of field on calculation, an object distance, a lens hypen-focal length, a diameter of permissible circle of confusion, a lens aperture value and a lens focal length.

Abstract: A camera has a camera body being made of an electro-conductive material and a plurality of windows for light-projection or a light intake thereon. At least one of covering members for the windows includes an exposed part being exposed toward an outside of the camera and a hidden part being located in an inside of the camera. A first electrode is attached to the exposed part and a second electrode is attached to the hidden part. When a finger obstructs the window, a detecting means detects a finger obstruction by comparing the electrostatic capacity at the first electrode with that at the second electrode relatively. Then, warning is generated for indicating the finger obstruction by a warning generating means.

Abstract: In a focusing state or photographed object distance detector, a pair of distance measuring lenses are arranged in positions symmetrical with respect to the reference axis of a photographing lens. A pair of light-receiving element arrays are arranged behind the pair of distance measuring lenses. A pair of image signals are obtained by controlling operations of the light-receiving element arrays by CCD control sections. A conformity degree between these image signals is calculated by an integral part shifting arithmetic circuit in an element unit of each of the light-receiving element arrays. An interpolating calculation of the conformity degree is made by a decimal part arithmetic circuit to provide a precise conformity degree distribution.

Abstract: A camera system having a power zoom lens and an automatic focusing device, comprising a zoom motor for zooming the power zoom lens, a focal length detecting device for detecting a focal length of the power zoom lens, an object distance detecting device for detecting a distance of an object which is in focus, and a calculation device for calculating an image magnification in accordance with the focal length and the object distance detected by the focal length detecting device and the object distance detecting device, respectively, and then calculating a target focal length at which the image magnification is kept constant, in accordance with the object distance detected by the object distance detecting device.

Abstract: A camera having a structure in which a colorimetric value is not influenced by the color tone of a main object to be photographed. The camera, in which a film having a data recording section can be loaded, comprises three light receiving portions differing in spectral sensitivity. Based on the output from the three light receiving portions, a colorimetric section measures a color tone of light surrounding the object to be photographed. The light receiving portions are arranged on a front portion of the camera and are arranged so as to receive light at a range larger than an angle of a photographed view. Based on the output of the colorimetric portion, a color correction amount determining portion determines a color correction amount during a printing operation. The data as to the color correction amount is recorded on the data recording section of the film by a recording unit.

Abstract: An automatic focus adjustment device for use with a camera having a photographic lens.

Abstract: This invention relates to a camera havingsight line detection means for detecting the line of sight of an observer,focus detection means having plural focus detection areas and capable of focus detection in each focus detecting area, andselection means for selecting at least one of the plural focus detecting areas, based on the information of the line of sight detected by the sight line detection means, wherein the selection means is adapted to select the focus detecting area based on the result of focus detection by the focus detection means, according to the state of detection of the line of sight by the sight line detection means.

Abstract: A distance measuring device for ensuring accuracy of the positional relationship between the optical axis of a light-receiving lens and the optical center of a light-receiving element obtains distance information data by measuring the distance to a target plate which is 1 meter from the distance measuring device. If the distance information is not smaller than 1.625 meter, a switch is connected to one pair of terminals and the difference between reference output data stored in a control circuit and output data of an AF-IC obtained when the distance to the target plate is measured with the switch connected to the pair of terminals is calculated and stored in a memory circuit. When the value of the distance information data is not greater than 0.375 meter, the switch is connected to another pair of terminals, and output deviation data is stored in the memory circuit 11 in the same way. When the value of the distance information value is smaller than 1.625 meter and greater than 0.

Abstract: An auto focus camera includes a focus detecting circuit, a lens driving circuit for driving a taking lens to an in-focus position based on a focus detection result, a starting signal outputting circuit for outputting a starting signal which starts a focusing operation, an operating member to be operated by a user after the starting signal is outputted, and a controlling circuit for controlling the lens driving circuit so as to drive the taking lens in manners different between before and after an operation of the operation member.

Abstract: A focus detection device for a camera capable of detecting focuses at a plurality of areas on a photographing field, comprises two pairs of photo-electric conversion device arrays arranged on one substrate in optical correspondence to two of said plurality of areas; the two areas being arranged on a line extending generally vertically to a horizontal center axis crossing an optical line on the photographing field, on the opposite sides of the center line; and a refocusing optical system for refocusing light beams passing through different points of an exit pupil of a photographing lens, onto the two pairs of photo-electric conversion device arrays; the refocusing optical system including a pair of refocusing lenses for focusing the light beams onto the two pairs of photo-electric conversion device arrays.

Abstract: A photo signal processing apparatus which comprises a light receiving unit of charge accumulation type for outputting a data corresponding to a condition of light received thereby, a data processor for applying a predetermined processing to the data outputted from the light receiving unit, an accumulation initiating device for causing the light receiving unit to initiate a charge accumulating operation, an accumulation interrupting device for interrupting the charge accumulating operation of the light receiving unit, a counter for counting a time passed during a period subsequent to the start of the charge accumulating operation of the light receiving unit and until the termination of the charge accumulating operation of the light receiving unit, and a control unit for activating the accumulation initiating device at a timing required to interrupt the charge accumulating operation of the light receiving unit at the time of termination of the data processing performed by the data processor.