OPERATING DEVICE OF CAMERA

摘要

PURPOSE:To simplify circuit and obtain highly accurate preset aperture information by providing the aperture preset ring of photographing lens and the two variable resistances interlocking to an open aperture correcting member on the same substrate. CONSTITUTION:The variable resistance which is adjusted according to the setting of the aperture preset ring of photographing lens and the variable resistance which is adjusted according to the open aperture correcting member of the photographing lens are disposed on the same substrate to reduce the relative errors of the both variable resistances. The substrate is disposed in the narrow spacing near the mirror and the two variable resistances are respectively interlocked to the aperture preset ring and open aperture correcting member of the photographing lens. Further the tow variable resistances are series-connected between the input and output ends of an operational amplifier so that the highly accurate preset aperture information is outputted from the operational amplifier.