| 摘要 |
A camera having an automatic focussing device and an automatic exposure control device operated in turn by a single electromagnet 2. Operation of the camera release causes current to flow through electromagnet 2, which releases plate 22 to allow auto focussing. Detection of a peak in received radiation causes a signal to be generated, which de-energises electromagnet 2. Plate 22 is locked by latch 19 at the in-focus position. If 96 ms after camera release the signal has not been generated, electromagnet 2 is de- energised, to release plate 7 and lock plate 22. 122ms after camera release, electromagnet 2 is re-energised, releasing plate 7 again to effect opening of the shutter blades 13. Completion of an exposure which releases electromagnet 2, to close the shutter. <IMAGE> |
