| 摘要 |
PURPOSE:To extend effective photographic distance and to obtain a desired aperture value by setting automatically a stop to an aperture close to an open aperture with the charge completion signal of an incorporated strobe, and also allowing manual setting. CONSTITUTION:When a preset signal S3 outputted by an AND gate G5 is at H, a presettable counter 3 which receives a signal S3 at a data loading terminal LD reads internal aperture data 4 as an aperture close to the open aperture from a data input terminal DATA.IN and outputs it to an aperture control part 2 from a data output terminal DATA.OUT. Consequently, aperture blades 5 are set. The signal S3 is at H when the incorporated strobe IS is charged (signal S5) and an external strobe OS is not charged yet (signal S6). Further, a desired aperture value is set according to the frequency of on-off operation of a manual aperture value setting switch FSW. |
