| 摘要 |
PURPOSE:To make possible changing over of photographic modes with ease by disposing contacts for automatic controlling of F value and T value respectively to the final ends of respective information setting parts of F value and T value and by using the combined code signals of ON and OFF of both of these contacts in an FT priority camera. CONSTITUTION:Plungers 4, 10 which move in cooporation to a shutter dial and aperture ring are respectively slide contacted to the respective resistors 2, 8 and contact pieces 3, 9 of T value information setting part 1 and F value information setting part 7 and the respective information values are set by changing resistance values according to the T value and F value and are led into an arithmetic circuit 5. The contacts 6a, 6b and 11a, 11b for automatic controlling of T value and F value are provided in adjacency to the end parts of the respective resistors 2, 8 and when the shutter dial is turned in the manual position, the plungers touch these contacts to turn them ON to emit the signal of ''1'' and in the case of OFF, the signal of ''0''. These code signals are sent to a mode discriminating circuit 19 which sets the photographic mode from the combination of ''1'' and ''0''. According to the photographic mode, a shutter control circuit 14 and aperture control circuit 16 are changed over to auto or manual control. |
