| 摘要 |
<p>PURPOSE:To prevent power consumption when a film is not loaded, by inserting a film loading detection switch in series to a partial circuit of electric operating circuits such as a display circuit and a rear curtain holding circuit, and making these circuits inactive when the film is not loaded. CONSTITUTION:When the film is not loaded, a film loading detection switch 5 is turned off, and a rear curtain detaining magnet Mg is not energized even if a release button is depressed to turn on a power switch SW1. Consequently, a shutter runs in mechanical control seconds. When the film is loaded, the magnet Mg is energized by turning-on of the power switch, and the detention of the rear curtain is released after seconds determined by a time constant circuit RsCs, the shutter operation is completed.</p> |
