Exposure mask for micro camera

摘要

An exposure mask adapted to be used with a micro camera whose microfilming format is changeable, is provided with an exposure aperture defining the size of the frames of the micro images to be recorded on a film. The mask has at least one data exposure aperture outside the exposure aperture, and is provided with an information section which is either mechanically or photoelectrically detected by a detecting member in the micro camera in order to change completely the microfilming camera format of the micro camera in accordance with the type of the exposure mask.