Abstract: Automatic focus adjusting device comprising a range finding means which generates a signal corresponding to a distance to an object to be photographed; means for setting a photographing lens to a position corresponding to the output signal from the range finding means; a primary judging means which judges whether or not a diaphragm setting is within the range in which fixed focus photographing is possible or not; and a secondary judging means which judges whether an output signal from the range finding means is at a level capable of operating an automatic focusing means, wherein the secondary judging means judges only when the primary judging means judges that a diaphragm setting is not within the range in which fixed focus photography is possible and the automatic focusing means is operated only when the secondary judging means judges the output signal is at a level capable of operating the automatic focusing means.

Abstract: An automatic exposure control method and device has photometry means for detecting the brightness of a subject and providing an output signal in response thereto, a shutter, driving means for driving the shutter toward a full aperture, closing means for closing the shutter in accordance with the output signal from the photometry means, and adjusting means for adjusting the photometry means in a stepwise manner to provide the output signal variably in accordance with the light detected and the opening position of the shutter. In one embodiment, the driving means for opening the shutter engages a series of contacts for correspondingly short-circuiting photoelectric elements providing the electrical signal output, thereby varying in a stepwise manner the charging of a capacitor in a comparator circuit for disengaging a solenoid controlling the shutter closing means.