| 摘要 |
An electrically-controlled shutter mechanism is provided with a pair of shutter blades, i.e., leading and trailing blades, which are to be actuated one after another within a given time interval in order to expose film to scene light through a slit formed between the blades. To ensure the formation of the slit the shutter mechanism is so constructed as to enable actuation of the trailing shutter blade after a lapse of a predetermined time period from an actuation of the leading shutter blade. The construction of the shutter mechanism also assures shutter operation with minimum exposure time when the electric shutter control is inoperable.
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