| 摘要 |
PURPOSE:To obtain an electric automatic flash (AF) function which obtains proper exposure by turning on a stroboscope synchronizing with the opening timing of a shutter blade even when a photographic condition change by providing a correcting value input means which corrects the variation of photographic conditioner. CONSTITUTION:Film sensitive information is preset in a counter 4 which counts an aperture detection value from an aperture detecting circuit 19 through a switch means 11. Then, a counter 16 in which a count-up value is set through a camera sequence control circuit 12 and D type FF13 corresponding to the variation of photographic condition is supplied with the number of pulses which corresponds to a set value from an oscillator 15. Those pulses are supplied to the counter 4 through an OR circuit 18 as well and the count contents of the counter 4 are corrected according to variation of photographic conditions. Then, the stroboscope is turned on according to the shutter blade opening based upon an aperture value corresponding to photographic distance from a decoder to attain the AF which controls proper exposure even when the photographic condition changes. |
