Asahi Kogaku Kogyo Kabushiki Kaisha

Asahi Kogaku Kogyo K.k.

Tadayuki Kirigaya

Hideaki Tsuji

Tetsuo Hosokawa

Hiroyuki Takahashi

Masahiro Nakata

Isamu Hirai

Masaaki Haga

Koji Sato

Masato Yamamoto

Akio Takahashi

Masashi Furuno

Yasuyuki Haneishi

Satoshi Takami

Hiroshi Kurei

Hiroyasu Ozaki

Hidefumi Kaneko

Ichiro Taguchi

Nobuhiko Matsudo

Kaoru Imakyure

A device for processing digital data receives digital data with a number of original digital data being reduced in a predetermined manner, discriminates whether a predetermined reference part of the received digital data meets a predetermined condition, sets a value corresponding to a remaining part of the received digital data, and modifies the value in a predetermined way if the reference part meets the predetermined condition.

Device for processing digital data of a DX code

The present invention relates to an optical camera having a zoom function in which a focal length can be varied or the variation is actuated by a focal length changing member, and in particular to a camera in which a focal length is varied through a motor. The optical camera has a zoom lens operable by a rotatable zoom ring for changing the focal length thereof. An automatic focusing operation is effected by a control means when the focal length is changed so that an image of an object viewed through a viewfinder remains in focus. The zoom lens can include a motor and an in-exposure zoom control means can be provided for controlling zooming movement of the lens during an exposure operation.

Motor driven zoom camera

A camera wherein exposure parameters fixed by a program line can be shifted along an exposure value EV line so that exposure parameters for an exposure operation are based on the shifted program line according to the preference of the camera user. The camera has setting means for temporarily changing these exposure parameters at a constant exposure value with respect to the values predetermined by a program line. A counting means counts the number of times that a shutter is released while the program line is shifted in one direction and control means stores the changed values for shifting the program line under certain conditions. In this way a learning function is provided to learn the aforementioned tendency of the user.

Camera with learning function

A dial rotatably mounted on a camera is provided with at least two kinds of information, corresponding to variable settings, functions, or modes. The dial may be rotated to set one of the kinds of information at a time, when an index mark points to symbols on the dial representative of individual settings or of a setting change mode to be performed in combination with other operating members provided to the camera. An LCD provided on the camera displays changes in the information in response to the rotation of the dial. The dial can have the kinds of information provided to the dial in adjacent angular ranges, or alternatively in concentric form, the kinds of information switchable by an additional member.

Information setting data dial for a camera

A camera having a zoom lens. The camera includes a shutter, an aperture and program exposure mode control. The program exposure control includes one or more reference program characteristics representing combinations of shutter speed and aperture corresponding to one or more of a portrait mode, a landscape mode and a close up mode. Each reference program characteristics define a predetermined aperture in a first range from a low shutter speed to a hand-induced vibration limit and defines a different aperture in a second range beyond the hand-induced vibration limit. One of the reference program characteristics is selected, wherein the hand-induced vibration limit is defined in accordance with a focal length of said zoom lens.

An indicator within a finder of a single lens reflex camera is provided with a simple construction. The indicator may include a mirror for reflecting light of an object transmitted through a photographing lens to form an object image onto a focusing plate, an finder optical system for viewing an image of the object formed on the focusing plate, a hollow-type pentagonal mirror, and a photographing information projector for projecting a plurality of light rays onto the focusing plate to form a photographing information image. The hollow type pentagonal mirror may include a pair of roof reflecting surfaces and a third reflecting surface for reflecting light, reflected by the pair of roof reflecting surfaces, toward an eyepiece optical system. The photographing information projector may be mounted in the vicinity of the pair of roof reflecting surfaces.

Indicator with finder of single lens reflex camera

An indicating apparatus within a finder of a single lens reflex camera includes a mirror which reflects light of an object transmitted through a photographing lens to form an object image on a focusing plate, and a finder optical system through which an image of the object formed on the focusing plate is viewed. The indicating apparatus further includes a mirror box which supports the mirror, and a photographing information projector provided on the lower portion of the mirror box to project and indicate an image of the photographing information onto the focusing plate without interfering with the front end of the mirror.

Indicator within finder of single lens reflex camera

A camera having an indicator provided in a finder optical system in which photographic information is indicated and which includes a sub-assembly having a light source and an information indicating plate. The camera includes an insertion groove in which the sub-assembly of the indicator is inserted, and an engaging device for engaging the indicator with the camera.

Camera having indicator with finder

An exposure control apparatus of a camera having a photometer, a film sensitivity detector, a calculator which calculates an exposure value, a diaphragm value and a shutter speed in accordance with a measurement by the photometer and the film sensitivity, an object distance detector, a strobe, a limit diaphragm value calculator that calculates a first limit diaphragm value, which varies with the film sensitivity, and a second limit diaphragm value, which varies with the object distance, when strobe light is emitted, and a minimum limit diaphragm value setting device which compares the first and second limit diaphragm values and selects the larger diaphragm value as the minimum limit diaphragm value to be used in the exposure control.

Exposure control apparatus of a camera

An automatic focusing device by which a focusing lens is operated in accordance with an object distance measured by a distance measuring unit. The distance of an object in a distance measuring zone provided in a view finder is determined to detect an abrupt change thereof. If the object distance is abruptly changed, the focusing lens is not operated to focus on a new object appearing in the measuring zone. Conversely, if the object distance is not abruptly changed, the focusing lens is operated to again focus on the object in the measuring zone.

Automatic focusing device for camera lens

A pentagonal mirror unit of a single lens reflex camera including a hollow pentagonal mirror, a mirror sheet which is secured to a camera body and which has a recess in which the pentagonal mirror is fitted, a plurality of positioning projections which project downwardly from the lower end of the hollow pentagonal mirror, and a plurality of positioning holes provided on the bottom of the mirror sheet recess, so that the positioning projections can be fitted in the corresponding positioning holes.

Pentagonal mirror unit of single lens reflex camera

An apparatus for protecting the photographing data display portion of in a camera having a protecting cover which covers the photographing data display portion. The protective cover can close and open the photographing data displaying portion.

Growing community of inventors

Tokyo, Japan

Tadayuki Kirigaya