Abstract: A camera uses a film cartridge, which has an information recording disk which is rotatable integrally with a cartridge spool shaft and represents information inherent to a film, and feeds the film leading end portion from the cartridge by using a driver. A data detector reads the film information from the disk of the cartridge loaded in the camera. A nonvolatile memory stores the film information read from the disk. When the cartridge is loaded into the camera, the camera feeds the film leading end portion from the cartridge, reads the film information, and writes the read information in the memory. Another camera uses a film having two perforations per frame. The moving amount of the film fed by a motor controller is detected by a film driven roller rotation detector. A perforation on the film is detected by the perforation detector. Prior to at least the driving operation of the motor controller, information indicating the film feeding operation is stored in an EEPROM.

Abstract: To improve a camera of the kind having the possibility of causing inconveniences such as a double exposure or the like in taking a shot after a battery is replaced and stowed again, a shutter release is allowed after the transport of the film is completed, if a sequence state of the camera obtained when a battery is stowed in the camera is a state before completion of transport of the film.

Abstract: In this invention, there is provided a camera using a secondary battery as a power source and including load means such as a flash device or motor driven by use of electric energy of the secondary battery, charging means having a charging control circuit for charging the secondary battery with electric energy supplied from an external power source provided on the exterior of the secondary battery, and a camera control circuit for "exclusively" driving and controlling the charging means and load means by use of an EEPROM as storage means, wherein the size of the camera is small, circuit protection can be attained, the precision of a specified voltage of a protection circuit on the secondary battery side is high, the design is simplified, and the manufacturing process and adjustment process can be simplified.

Abstract: In a film feed device using a film having two perforations per frame, a perforation width and a perforation interval which are detected by one perforation sensor during a film feed operation are measured as times by timers in a microcomputer or as film moving amounts by a perforation detection circuit. When the time or the film moving amount measured as this perforation interval is less than the value obtained by multiplying the perforation width by a predetermined value, the film feed operation is stopped by a motor driving circuit and a motor. With this operation, even if the film position deviates from a predetermined position at the start of a film feed operation, the film can be accurately aligned with a correct position by using one perforation sensor.

Abstract: There is provided a battery presence/absence detection mechanism (80) which operates according to the presence/absence of a battery (4) in a battery housing (3). When the battery (4) does not exist in the battery housing (3) or is removed from the same during the course of advancement of film, a battery presence/absence detection lever (801) and first and second battery presence/absence transmission levers (802, 803) operate so as to pivot a first winding lock lever (701) of a double winding prevention mechanism (70) to a position where it prevents the pivotal movement of a ratchet pawl (202) in a first direction. The double winding prevention mechanism (70) is attracted to and held in a reset state in which a film advance lever (10) cannot be actuated, by a magnet (703B) of a lock control means (703) via a second winding lock lever (702). It is possible to prevent wasteful advancement of film and to enable stable advancement of film even if a battery is at the end of its life or is removed from a camera.

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 film feed control apparatus feeds film with an electrical feeding mechanism in a film feeding direction and stops the film at predetermined positions. The film includes a plurality of photo frames. A predetermined number of perforations having edges at leading and trailing sides of the film are defined at predetermined positions at the photo frames. An edge detector detects edges of the perforations of the film as the film is fed in the feeding direction. A physical amount detector detects a physical amount that relates to an amount of film that is fed from a time when the film feeding starts to a time when an edge of a predetermined perforation is detected. The physical amount detector also detects a physical amount that relates to an amount of film that is fed from the time when the edge of the predetermined perforation is detected to a time when another edge is detected.

Abstract: When an operation such as the operation of the shutter release button or the closing of the cover to the film container compartment is performed, any operation such as charging that was underway is stopped once and checking of the battery voltage level is performed with reference to reference levels, wherein it is determined whether or not any such operation was underway when either of said operations was performed, and if any such operation was underway, that operation is stopped once, and the battery voltage level is checked with reference to reference levels that are reduced by a preset amount. Consequently, an accurate check of the battery voltage level may be performed with regard to the battery voltage that had fallen due to the carrying out of such operation but that is rising to the original voltage level due to that operation being stopped.

Abstract: A camera including a camera body, a lens barrel, a power supply source to supply power to circuits of the camera, and a main switch to switch the power supply source between a power supplied status and power-not-supplied status. The lens barrel has a first position which is where the lens barrel is completely retracted within the camera body, a second position which is where the lens barrel is set when the main switch has gone into the power supplied status, and a reference position which is for positional control of the lens barrel with respect to the camera body. The reference position is between the first position and the second position of the lens barrel. If a new battery is inserted into the camera, the lens barrel is not moved, thereby preventing a camera holder from dropping the camera.

Abstract: A battery check device which assesses a state of exhaustion of a battery installed in a camera, and which can accurately assess at any time the state of exhaustion of the battery according to the drive state of a camera mechanism, such as a mirror. The battery check device includes a voltage detection device to detect the voltage of the camera battery, a drive detection device to detect the required time needed to drive the camera mechanism, a memory in which is stored the required time detected by the drive detection device, and a calculating device which inputs the battery voltage detected by the voltage detection device and the required time which has been recorded in the memory, and calculates a degree of exhaustion of the battery corresponding to these values. A display then displays the degree of exhaustion of the battery which has been found by the calculating device.

Abstract: A camera has a motion compensation device which is stable in operation. A motion detection unit determine motions of the camera and a motion compensation unit drives a motion compensation optical system to remove blur of an image due to the motion of the camera. A communication unit transmits operating instructions based upon the amount of motion from the motion detection unit to the motion compensation unit and a monitoring unit determines whether an anomaly exists in the operating instructions. A locking unit locks the motion compensation optical system in a centering position if the anomaly exists. According to another embodiment, the motion compensation optical system is driven to a center position prior to the performance of the motion compensation and inhibits movement by the motion compensation optical system if a defect occurs during the centering operation.

Abstract: A camera powered by a battery has a first memory area for storing first data used in operating the camera and for retaining the first data irrespective of a power source interruption in the camera, and a second memory area powered by the battery for storing second data which is dependent upon the first data. A power interruption in the camera, such as occurs when the battery is exhausted or replaced, is detected by comparing the first data stored in the first memory area with the second data stored in the second memory area. After detection of a power interruption, the camera is initialized and the first data stored in the first memory area is then copied into the second memory area. Since the first memory area and the second memory area are compared each time the camera is activated, the state of the battery can be reliably checked.

Abstract: A camera having a film counter according to the present invention includes a display device which displays information related to frames of a film; a detector which detects that a battery has been replaced while the camera is loaded with the film; a volatile memory which stores information related to a number of remaining unexposed frames of the film; and a controller which causes the display device to display the number of remaining unexposed frames according to the information stored in the volatile memory until the battery is replaced, and switches the display device to display a frame number in a forward count display, in which a frame number increases for each exposure, in response to a signal generated by the detector upon replacement of the battery.

Abstract: This camera performs battery checking which corresponds to the respective photographing modes at the time of presetting the various photographing modes. This battery check calculates an added electrical quantity between an electrical quantity consumed for 5 minutes, during which an auto-power off mechanism is operated in a state where a photographing mode is set and an electrical quantity required for the time from the start of the photographing under this photographing mode to completion of the photographing under this photographing mode in association with the selected photographing mode. Then, the added electrical quantity thus calculated is compared with a residue of the battery for a camera power source, and, only when the residue of the battery exceeds the added electrical quantity, presetting of the photographing mode is permitted.

Abstract: A data imprinting device of a camera, when a free mode is set, is responsive to operation by each camera user, and prepares character strings as desired by the camera user and stores the prepared character strings to an electrically rewritable non-volatile memory E.sup.2 PROM. When the free mode is set, character strings stored in the E.sup.2 PROM are read out from the E.sup.2 PROM according to operation by the camera user, and displayed on an imprint display unit and used for imprinting. As character strings prepared by the camera user are stored in the E.sup.2 PROM, the character strings are preserved without being destroyed even when a power source is shut down because a battery is unloaded or used up.

Abstract: Apparatus for detecting a sight axis may be used with a device for detecting the attachment of a detachable power supply. Forming structure is provided for forming information corresponding to a sight axis of a viewer of the apparatus. Structure is also provided for detecting when the power supply of the apparatus is switched on. Setting structure is provided for setting a first control mode for controlling the apparatus on the basis of the information formed by the forming means, and a second control mode for controlling the apparatus without utilizing the information. Control circuitry is provided for preferably causing the setting structure to automatically set the second control mode when the power supply is detected as being switched on. Preferably, a first storage area is provided for storing correction data unique to the viewer and used for correcting the sight axis information.

Abstract: A battery check device for a camera which includes a discharging circuit to which current flows from a battery and a discharging time setting device for setting a discharging time for determining that an internal resistance of the battery has increased due to non-use of the battery so as to temporarily reduce an output voltage of the battery. The discharging time set by the discharging time setting device is longer than a time required to check the residual energy amount of the battery. A determining device determines whether a voltage of the discharging circuit has reached a reference voltage specific to the battery within the discharging time.

Abstract: A camera, which uses a film cartridge having a film exposure status display, comprises an E2PROM. The E2PROM stores the fact that the film status determination operation is underway when film status determination operation is underway. When a power supply is removed while the film status determination is operating and then the power supply is mounted, the camera operates an initial process. The film exposure status display is set in `exposed` because the E2PROM holds that the film status determination operation is underway. A camera is .provided that deems the film in the film cartridge to have been exposed and does not perform exposure if the power supply is cut off while the determination of the film status of the film in the film cartridge mounted in the camera is underway.

Abstract: A camera with an image stabilizing device includes a power supply for the camera, image stabilizing means for preventing image blur of the camera, discrimination means for discriminating a status of the power supply, and control means for varying a manner of discrimination by the discrimination means in accordance with the status of the image stabilizing means.

Abstract: In a camera which is provided with a clock which operates according to electrical power supplied from a battery, the date and time of photography are imprinted based upon the date and time output from the clock. When the changeover of the battery is detected, the recording of the date and time of photography is prevented, and when the date and time of the clock have been reset the prevention of recording of the date and time of photography is ceased.Further, in a camera which is provided with a clock which operates according to electrical power supplied from a battery, and with a display device which alternatively displays either the date and time output from the clock or the film frame number, when the changeover of the battery is detected, forcibly the date and time output from the clock are displayed on the display device.