| 摘要 |
FIELD: cine and photographic equipment. SUBSTANCE: proposed electromagnetic shutter includes two tabs 64, 66, exposure setting ring 8 turned by pulse stepping motor and including cam 14 for exposure setting and opening of tabs, boss 18 and release cam 16, focusing ring 10, spring 43 of return motion to ensure reverse motion of focusing ring, means blocking focusing ring 10, contactor 86, central processor 92 to control turn of pulse stepping motor in accordance with signal coming from circuit determining illuminance and distance to object. EFFECT: increased functional reliability and speed of shutter. 12 cl, 16 dwgd
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