Abstract: A camera has a video camera unit to shoot a movie picture and a still camera unit to shoot a still picture so as to allow movie and still pictures to be taken simultaneously. The camera is provided with mechanism to automatically wind or rewind a film installed in the still camera unit. While a movie picture shooting operation is taking place, the camera disables the film wind and rewind operations so as to prevent the noise due to the film wind or rewind operation from being recorded in the video camera unit.

Abstract: A camera for shooting a movie picture and a still picture has a casing in which a pair of imaging optical systems for shooting a still picture and a movie picture, respectively are opened in a front surface of the casing. A functional section for shooting a still picture is disposed in the proximity of the imaging optical system for shooting a still picture, circuits and mechanisms necessary to shoot a movie picture are located in the rear side of the imaging optical system for shooting a movie picture, and a video tape recording mechanism and circuits related thereto are arranged at the back of the functional section for shooting a still picture. Consequently, a movie picture and a still picture can be shot at the same time. Since a film can be loaded in and removed from the camera through the upper surface of the casing, a statisfactory operability is attained.

Abstract: A video camera includes a casing having a generally rectangular parallelepiped shape, a first imaging optical system for shooting a still image and a second imaging optical system for shooting a video picture. The first and second imaging optical systems are disposed in a front surface of the casing so as to be directed to an object scene. A still camera unit is also disposed in the casing in the proximity of the first imaging optical system for shooting the object scene to record a still picture thereof on a film. A video circuit is provided in the casing on the rear side of the second imaging optical system for shooting the object scene to form a video signal representing a movie picture thereof, and a video tape recording section is also provided in the casing on the rear side of the first imaging optical system for recording the video signal on a video tape.

Abstract: A camera includes a video camera unit to shoot a movie image and a still camera unit to shoot a still image so as to permit the movie and still images to be shot at the same time. The still camera unit has a unit to wind up a film, and a driving force is imparted to the windup unit by means of two rotational force impart units respectively having smooth surfaces to contact with each other. Consequently, when a still image is shot while movie image shooting is taking place, noise produced by winding up the film can be minimized.

Abstract: A magnetic recording and reproducing device in which an optimum recording bias current, optimum recording level and optimum recording equalization characteristic are automatically set wherein a desired MOL balance dependent upon a difference of a magnetic characteristic is achieved. A recording bias is varied at predetermined time intervals. A variable low-frequency oscillator supplies a low-frequency signal upon which the recording bias current is superposed for recording upon a magnetic medium. The maximum value of a reproduced signal of the recorded signal is detected and the recording bias current set to supply an optimum recording bias current corresponding to the maximum value of the reproduced signal. The low-frequency oscillator is set to oscillate at an optimum frequency dependent upon at least one of the type of the magnetic medium and a magnetic characteristic thereof.

Abstract: A calibration circuit for charging and discharging is connected between the both terminals of a battery, a memory circuit is connected to the calibration circuit, and an indicator is connected to the memory circuit. The remaining capacity of the battery is shown correctly by the indicator independently of whether the battery is charged, discharged, has been charged or has been discharged.