| 摘要 |
An auxiliary time circuit comprising auxiliary resistors connected in series with an auxiliary capacitor is connected, in parallel, with a main time circuit comprising a photoconductive element, such as Cds, connected in series with a photometric or main capacitor. These main and auxiliary time circuits are connected, via separate diodes, respectively, with a transistorized switching circuit containing therein an electromagnet for controlling the shutter. With this arrangement, an exposure time range beyond the predetermined time range can be regulated by said auxiliary time circuit.
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