Abstract: When a sensitivity of film used for photographing is less than a predetermined sensitivity, or when an external light brightness measured by a photometry means is more than a predetermined brightness, a strobe exposure is controlled to decrease gradually from 0 EV flash, wherein a standard strobe exposure can be obtained, to -1 EV to -2 EV to -2 EV . . . . On the other hand, when the external light brightness is less than the predetermined brightness, the 0 EV flash is performed compulsively regardless of the film sensitivity, and the ratio of the strobe exposure becomes high, so that the exposure contribution rate of the external light is relatively lowered. As a result, the spectral characteristics of the external light source have small effect on the image surface when the high-sensitivity film is used, and the color fading caused by the spectral characteristics of the external light source can be prevented.

Abstract: A zoom camera has a push button switch that is constituted of a single disc virtually radially divided into sections, and switches disposed behind the sections one by one. The single disc is supported in a center such that the single disc tilts in a different direction when pushed at one of the sections, and returns to a horizontal state by a spring force. One of the switches is actuated to output a signal when a corresponding one of the sections is pushed. The push button switch doubles as a mode setting operation member and a zooming operation member. When the mode setting operation is designated by a manually operable switch, the signals from the switches are used for the mode setting. Otherwise, the signals from the switches are used for zooming.

Abstract: A warning system of a camera for providing a photographer a warning indicating an impediment to a window, provided in a front wall of the camera, through which light traveling toward and/or from a subject passes. It includes a touch sensor, disposed in close proximity to the window, which involves a resistance, or a body capacity, of a photographer's finger touching the sensor in, and as a part of, an electric circuit. This provides a change in electric parameter of the circuit by which a warning device is actuated to emit light, or otherwise generate sound, as the warning of impediment.

Abstract: A camera equipped with a date recording device and a display for showing at least the time. Also included is a device to display the time on the film. The display also indicates battery power and flashes to indicate when the battery has been replaced.

Abstract: A camera equipped with a date recording device which has a function switch selectively operative in two functions, an operation mode setting function for setting a specific operation mode of the camera and a display mode setting function for selectively setting display modes of the date/time display device, a function changing switch for causing the function switch to select one of the two functions. The date/time display device displays a time thereon when the function switch is operative with the operation mode setting function and flashes on and off at least one of figures of figures indicating the time when operative with said display mode setting function.

Abstract: A built-in flash camera includes a strobe which is flashed regularly, a photometry part for measuring a brightness within a shot visual field and an automatic exposure mechanism. A changeover brightness is set to be lower than a limitation brightness (reference external light brightness) in which an AE control can be performed. When the brightness measured by the photometry part is lower than the changeover brightness, the strobe is flashed so that the exposure of the strobe can be standard (100%). When the brightness measured by the photometry part is higher than the changeover brightness, the exposure of the strobe light is decreased to be 75% of the standard exposure. As a result, the exposure of the strobe can be prevented from being excessively large when the external light is in a proximity of the reference external light brightness.

Abstract: A camera has a finger detecting device for indirectly detecting that a finger rests on an electronic flash and so forth due to unsuitable holding of the camera. The finger detecting device comprises a conductive member and an auxiliary electrode. The conductive member is disposed near the electronic flash and bared to outside of the camera. The auxiliary electrode is connected to the conductive member and disposed in the camera. A detecting electrode faces the auxiliary electrode via an insulating member. The finger is detected on the basis of change of capacity applied to the detecting electrode. Sensitivity of the finger detecting device is improved by changing the size of the auxiliary electrode without enlarging the conductive member. Accordingly, although the bared portion of the conductive member is small, the finger detecting device has a detecting performance which is similar to that of conventional one.

Abstract: A built-in flash camera includes a strobe which is flashed regularly, a photometry part for measuring a brightness within a shot visual field and an automatic exposure mechanism. An exposure of strobe light is decreased gradually from a standard exposure in accordance with the brightness measured by the photometry part and the object distance measured by the focusing part. The strobe is prohibited from flashing when the measured object distance is longer than a predetermined distance D3 and the measured external light brightness is higher than a predetermined brightness B2, which is enough to obtain a standard light exposure required for photographing. As a result, the optimum exposure can be obtained in accordance with the object distance and the external light brightness, and the electricity can be saved.

Abstract: An active type focusing part, including a projector and a light acceptor, is capable of measuring a reflectance of the main subject. When a distance measured by the focusing part is smaller than a predetermined distance, the reflectance is measured. A strobe light control part controls a strobe light in accordance with the measured distance, the measured reflectance, and a brightness measured by a photometry part. The strobe light control part decreases an exposure of the strobe light as the measured reflectance increases, so that the exposure of the strobe light is set appropriately.

Abstract: A camera comprising a mode setting portion in which either mode is set out of a first focusing mode and a second focusing mode; a mode switch; detecting means; focusing means; and focusing mode controlling means for performing such a control, after completion of focusing, that when the period detected by the detecting means is longer than a predetermined period and the second focusing mode is set, or when the first focusing mode is set, the mode is held as it is, and that when the period is shorter than the period and the second focusing mode is set, the mode is switched to the first focusing mode. The present invention provides a camera which permits the user to select either the operation in which the mode change is performed every shot or the operation in which a same mode is continuously maintained, by the period in which the mode switch is kept on.

Abstract: A camera comprising a mode setting portion in which either mode is set out of a first focusing mode and a second focusing mode. The camera includes: a mode switch, detecting means, focusing means, and focusing mode controlling means for performing such a control. After completion of focusing when the period detected by the detecting means is longer than a predetermined period and the second focusing mode is set or when the first focusing mode is set the mode is switched to the first focusing mode. The present invention provides a camera which permits the user to select either the operation in which the mode change is performed every shot or the operation in which a same mode is continuously maintained, by the period in which the mode switch is kept on.

Abstract: A photometry part measures a brightness within a shot visual field. A focusing part measures a distance up to a main subject. A focal length measuring part measures a focal length of a taking lens. A strobe light control part directs a strobe to flash regularly and decreases a strobe exposure gradually from a standard exposure in accordance with the measured parameters. The measured distance at which the exposure of the strobe is decreased, is defined as the strobe changeover distance. The strobe light control part sets the strobe changeover distance to be long as the focal length at photographing becomes long, so that the exposure of the main subject on the image surface can be kept proper.

Abstract: A drive control apparatus of lens housing for camera, comprises a camera body, a lens housing, a drive unit, signal generating means and a control unit. The position detection of the lens housing is carried out only at a single reference position, and in each processing for moving the lens housing, the control for moving the lens housing to a first, second or third position is carried out based upon this single reference position after the lens housing is once moved to the reference position to execute position detection. According to the drive control apparatus of the present invention, it is possible to achieve a possibility of occurrence of detection error which is lower than those with conventional one requiring the position detection at at least three positions.

Abstract: A camera with a built-in photoflash unit comprises a camera body; a photoflash unit; a detection electrode for detecting a capacitance added thereto and detecting an induced voltage generated therein by flashing of the photoflash unit; control means for detecting a change in the capacitance or the induced voltage caused in the detection electrode; and display means for informing that the window is blocked or that the photoflash unit flashed. The camera has both functions to inform that a photographer's finger is blocking the window of the photoflash unit and to inform that the photoflash unit normally operated to flash.

Abstract: An ever-flash exposure control system for a built-in flash camera regulates a triggering time T1 from the commencement of gradual opening of a program shutter at which an electronic flash is triggered and a flash duration time T2 for which the electronic flash continuously provides illumination light so as to provide proper exposure according to scene brightness.

Abstract: Here is disclosed a range finder utilizing a line sensor of charge accumulation type, wherein photosensitive monitoring means is provided to monitor luminance of a scene to be photographed, an appropriate amplification factor is selected on the basis of integral value of charge accumulated by the photosensitive monitoring means, a video signal output from the line sensor and reflecting the luminance of the scene is amplified at the selected amplification factor, then the amplified video signal is computed and thereby a period required for charge accumulation in the line sensor is shorten independently of the scene's luminance.

Abstract: An isoprene-based hydrocarbon resin having a softening point of from 60.degree. to 140.degree. C. and a number average molecular weight of from 500 to 2000 which is obtained by cationic polymerization of a monomer mixture comprising from 40 to 90% by weight of isoprene and from 10 to 60% by weight of an aliphatic monoolefin containing 4 to 10 carbon atoms in the presence of a Friedel-Crafts catalyst and an adhesive composition comprising 100 parts by weight of a base polymer selected from the group consisting of an amorphous propylene polymer, a block copolymer rubber and isoprene rubber and from 10 to 200 parts by weight of said isoprene-based hydrocarbon resin as a tackifier are disclosed. The isoprene-based hydrocarbon resin is excellent in hue and heat stability to provide an adhesive composition excellent in heat stability.

Abstract: A range finder circuit for a passive-type autofocusing device includes three line photosensors. Secondary differences of their output signals and the zero-cross points of the secondary differences are detected and stored. A coincidence detecting circuit compares the stored zero-cross behavior signals and detects a coincidence of these zero-cross behavior signals. A range finding is obtained from the coincidence information. According to one embodiment of the invention a first photosensor is selected as a reference photosensor and zero-cross behavior signals obtained from the other photosensors are successfully shifted relative to the zero-cross behavior of the reference photosensor until a coincidence is detected. According to another embodiment of the invention, a pixel location of one photosensor where zero-cross data exists is provided with a predetermined width tolerance on both sides of the pixel location.

Abstract: An autofocusing circuit includes an extrinsic light eliminator including a light emitter such as an infrared emitting diode for projecting a signal light reflected by an object to be photographed and detected by a photodetector to determine the distance to the object. A chopper integrating circuit to convert the photocurrent from the detector to a corresponding voltage and simultaneously amplifies this voltage. In a preferred embodiment, the operating period of the chopper integrating circuit is set to 0.025 sec. multiplied by an integer in order to assure that any extrinsic light components derived from a commercial power supply is reliably eliminated from the detected photocurrent no matter whether the commercial power supply is of 50 Hz or 60 Hz.

Abstract: A range finder for a passive type autofocussing device includes three photosensors comprising three line sensors. Differences of the luminance distribution of a scene detected by the respective photosensors are computed and the zero-cross points of the difference are detected. The zero-cross behaviors thus detected are compared to one another with the zero-cross behavior associated with one of the three line sensors being selected as a reference and the zero-cross behaviors associated with the other two line sensors being successively shifted relative to said reference until a coincidence of the zero-cross behaviors associated with the three line sensors is detected. The range to the scene is computed based on an amount that the zero-cross behaviors associated with the other two line sensors has to be shifted until coincidence is detected.