| 摘要 |
<p>PURPOSE:To eliminate the error and the trouble of operations, by providing a switch for selecting the lock mode of automatic exposure seconds and operating this switch before the start of photography to store shutter seconds of the next photography and performing the next photography and following photographies under the same exposure condition. CONSTITUTION:A main part consists of an automatic exposure seconds lock circuit (EE lock circuit ) 1 which stores and holds shutter seconds for automatic exposure photography, a display circuit 2 which displays shutter seconds in a finder or the like of a camera on a basis of stored photometric data, and a shutter controlling circuit 3 including a photometric circuit for automatic exposure photography. When a changeover contact terminal (a) of an EE lock mode selecting switch SW1 is switched to a fixed terminal (b) to select the EE lock mode, a positive single pulse generated in a capacitor C1 is supplied as an EE lock signal to the EE lock circuit 1, and this circuit 1 is made operated, and a mode switching signal S5 and a shutter control signal S7 are outputted from this circuit 1.</p> |
