| 摘要 |
<p>In a photographic camera, an electrically powered memory device (65) stores data obtained by sensing detectable means on a filmstrip, but loses stored data upon a power diminution below a minimum level necessary for memory retention. When electrical power is resumed, a film drive (27) is operated to rewind the filmstrip at least until the detectable means previously sensed during film advance have been returned past the filmstrip sensing device (35.) Then the film drive (27) is operated to re-advance the filmstrip substantially the same distance it was rewound. During re-advance, the sensing device (35) again senses the detectable means to restore lost data to the memory device (65). </p> |
