Abstract: A photographing lens system includes at least one zooming lens. A photometric circuit measures brightness of an object. An exposure calculation circuit calculates an exposure value in accordance with an output from the photometric circuit. A distance measurement circuit measures a distance to the object. A magnification setting circuit determines a photographing magnification of an image of the object to be formed on a film arranging surface. An auto-zooming calculation circuit determines a focal length of the photographing lens system in accordance with an output from the magnification setting circuit, and an output from the distance measurement circuit. A drive circuit drives the zooming lens in accordance with an output from the auto-zooming calculation circuit. A switch is turned on upon a first stroke of a release button.

Abstract: An apparatus has an automatic focus detection device. The automatic focus detection device detects a focus condition of a taking lens by using a plurality of detection areas. These detection areas are displayed on a finder. The plurality of detection area are displayed on the finder in a specific order according to a situation of the camera by throwing a switch designating a detection area.

Abstract: The camera includes two functionally equivalent line and field scanners, one for issuing a light pulse that will be returned by an object point, and identified by a particular line/field scanning position in both scanners; the second scanner being attuned to recognize the returned light in one scanning raster point only for purposes of correlation. The field scan is realized through a deflecting mirror or in a columnal array the line scans are either solid state or fiber optics.

Abstract: An optical apparatus which detects a visual axis using plural reflected images of a light source includes an observation device with which an observer observes an object. An image sensor is provided for generating a signal and response to an image. Optical structure is provided for forming a plurality of reflected light source images on the image sensor by reflection of light from the eye of the observer. The optical structure includes (1) an illumination assembly for projecting a light beam from at least one light source to the eye of the observer, and (2) a convergence component having at least one convergent lens for converging the light beam reflected from the eye of the observer, to produce the plurality of reflected light source images. The optical structure includes at least two light sources and/or two convergent lenses.

Abstract: A camera system includes a camera body, and an interchangeable lens that is detachably mounted to the camera body. The interchangeable lens includes an input/output circuit for performing input/output information relative to the camera body and a timing circuit outputs a clock signal. The camera body includes an information processing circuit for performing data communication relative to the input/output circuit on the basis of the clock signal outputted from said timing circuit.

Abstract: A camera comprising an operation member to which a plurality of exposure mode marks are attached, the operation member being arranged to be movable and to enable the camera operator to know an exposure mode selecting state with the position of the mark of a selected exposure mode adjusted to the position of an index mark; and an electro-optical display device which includes at least a numerical value display part, the display device being arranged to display camera information other than information indicated by the plurality of exposure mode marks attached to the operation member.

Abstract: A range meter for a camera has a plurality of irradiation sources for irradiating beams in different directions, and a plurality of receivers for receiving reflected irradiation, the receivers providing outputs responsive to the point of the respective receiver that receives irradiation. In order to adapt the meter for measurement in different distance ranges, the outputs of the receivers are sensed in response to irradiation from different sets of the sources.

Abstract: A camera includes an object distance detecting device. The detected object distance can be used to calculate magnification which, in turn, can be used to determine an aperture value. The object distance detecting device can be selectively operated depending on, for example, whether flash lighting is being used.

Abstract: A method of predictably producing accurate photoprocessing reference image tool photographs to be used for adjusting the parameters of photographic devices, in which a first-generation camera-original image of a scene containing preselected background and subject content is photographed onto a first photographic recording medium. A second first-generation camera-original image of charts containing photoprocessing parameter control information is photographed under the same conditions as the first exposure, onto a second photographic recording medium. The first image is photodigitized into a first digitized image which is stored in a primary digital image data metric in a digital image data base. One or more parameters of the first digitized image are selectively adjusted. Photoprocessing control element(s) (e.g.

Abstract: In an exposure control device employed in an electronically controlled camera, an exposure value, representing the relation between an exposure time and an aperture value, is determined in accordance with the brightness of an object to be photographed. In addition, the open F-number of a lens is determined based on a predetermined film sensitivity. When the exposure value is determined, it is limited to a predetermined minimum exposure value. In the camera, the minimum exposure value is compensated in accordance with the film sensitivity of the film to be used.

Abstract: A camera having a line of sight detecting apparatus to detect a line of sight of an eyeball of an observer comprises: a lens device having a movable lens; a detector to detect a moving state of the movable lens in the lens device; and a controller for making the line of sight detecting operation by the visual axis detecting apparatus different from that in the case where the movable lens is not moved when it is detected by the detector that the movable lens has been moved. When a focusing lens as a movable lens is being driven, the controller stops the line of sight detecting operation by the visual axis detecting apparatus or doesn't use the line of sight detection information for the camera control.

Abstract: The disclosure relates to an exposure calculation apparatus which includes plural light measuring devices for measuring lights incident on a plurality of regions of a photographing image plane and outputting measured data of the lights; plural devices for detecting the focusing conditions of objects present in a plurality of the regions of the photographing image plane and outputting data on the focusing conditions; a position detecting devices for detecting the position which a main object occupies in the photographing image plane on the data on the focusing condition outputted from the focusing conditions detecting devices; calculation device for making a plurality of calculations each of which is made depending on at least one of the data of measured lighs outputted from the light measuring devices; and selecting devices for selecting one of the plurality of calculations on the position detected by the position detecting devices and the data on the focusing conditions of the position.

Abstract: A distance measuring device of camera for measuring distance to a pictured object includes pulse-driven first, second and third beam projecting elements. When a distance to the pictured object is long and beams of the beam projecting elements reflected from the pictured object are small in quantity or become nil, the first beam projecting element is pulse-driven until the number of light emission reaches a predetermined first maximum number of light emission, and the second and third beam projecting elements are pulse-driven until the number of light emission reaches a predetermined second maximum number of light emission which is less than the predetermined first maximum number of light emission. Because of this, when a distance to the pictured object is long and the beam projecting elements are pulse-driven to the predetermined first or second maximum number of light emission, it is possible to shorten a distance measuring time.

Abstract: According to this invention, a camera system has a camera body and a first and second lenses exchangeable to the camera body. The first lens comprises a device for outputting first data which indicates the first lens belongs to a first lens type. The second lens comprises a device for outputting second data which indicates the second lens belongs to a second lens type and third data with respect to the characteristic of the second lens.

Abstract: An auto-focusing apparatus adjusts focus of a photographing lens based on the focus detection in accordance with object image signals in an overflow of a portion of the signals is within a permissible level so that a delay time in the lens drive is shortened and the operability is improved.

Abstract: A photographic optical system controlling apparatus carries for out an automatic focusing control and an exposure control. The apparatus includes a motion vector detecting device for detecting the motion of the image and changes a gate area or a photometric area. The result is that the focusing or the exposure controlling operation can be carried out accurately following the motion of a main object, irrespective of the positional change of the object the screen.

Abstract: A camera of the kind performing a preliminary flashing action before flash photographing for the purpose of preventing the red-eye phenomenon is arranged to give indications to enable the photographer to know selection of a preliminary flashing mode when this mode is selected and execution of the preliminary flashing action when the preliminary flashing action becomes feasible.

Abstract: An automatic follow-up focus detecting device comprises means for shiftably setting a follow-up field; extracting means for extracting a feature of an object in relation to the follow-up field; storing means for storing the extracted feature; detecting means for detecting a relative shift between the object and the device on the basis of the feature of the object extracted by the extracting means and the feature stored by the storing means; and shifting means for shifting a distance measuring field following the object according to the relative shift.

Abstract: A zoom camera being capable of changing a distance measuring direction to measure an object distance, and more particularly a camera which indicates the distance measuring direction overlapped on an object image in a view finder display. An object image is displayed in a finder display through an optical system, thereby the magnification of the object image in the view finder changes in accordance with a zooming of the camera. An indicator array is arranged on the view finder display, and the distance measuring direction is indicated by an activation of an indicator element of the indicator array located at a corresponding position to an object position in the distance measuring direction.

Abstract: An object distance detecting apparatus having a light projecting device for projecting a pulse light toward an object to be photographed and a primary semiconductor position detecting device for receiving the reflected light from the object by this light projecting device and outputting a first current value and second current value corresponding to the object distance, comprising:a first integrating circuit for integrating a predetermined number of times the added value of the above-mentioned first current value and second current value, a second integrating circuit for integrating a predetermined number of times the ratio operating value of the above-mentioned both current values, a first calculating device for calculating the object distance on the basis of the square of the output of the above-mentioned first integrating circuit and a second calculating device for calculating the object distance on the basis of the output of the above-mentioned second integrating circuit so that, when the output of the fi