| 摘要 |
<p>1520869 Exposure control PENTACON DRESDEN KAMERA-UND KINOWERKE VEB 16 June 1977 [20 July 1976] 25243/77 Heading G2A A photographic camera has a device for determining the exposure manually, or automatically using a photo-electric device. A knurled ring 18 is rotatable and is connected to a member 5 which has a contact 6 moving over a plate 7 whereby the exposure is set manually. In the position for automatic exposure setting, a projection (23) Fig. 2 (not shown), connected to the ring 18 lies between fixed shoulders (24), (25). To move the ring 18 from the automatic position to the manual position, the ring must be pulled axially so that projection (23) may pass the shoulders (24), (25). Thus the ring cannot be turned from one position to the other inadvertently.</p> |
