Abstract: A controller uses image processing to detect any abnormalities in the shape and distance of the perforations of a motion picture film by means of image data obtained upon imaging the perforations of the running motion picture film by a video camera in a sensor unit arranged in the film running path. If any abnormalities are detected in the perforations in the motion picture film running in the film running path, an error output specifying such abnormalities is fed to a system controller that operates to stop the film drive system including stopping the intermittent film feed at the optical film gate and extinguishing the light source illuminating the film.

Abstract: A lens apparatus suitable for use with a video camera body, comprises a lens body, an attachment surface formed at a rear end portion of the lens body and serving as a flange back reference surface, a base member projecting rearwards from the attachment surface, a movable electrical terminal provided on the base member and biased rearwards for engagement with a fixed terminal on the video camera body, and a positioning recess formed on the base member for engagement with a positioning projection on the video camera body.

Abstract: A white balance control system for a television camera wherein the levels of the red, green and blue signals are compared and supplied to updown counters which are operated based on the relative values of the color signals and based on the detected and stored information, one of a plurality of color filters is selected for use with the video camera so as to provide the correct white balance.