| 摘要 |
1284749 Photographic cameras AGFAGEVAERT A G 31 Oct 1969 [31 Oct 1968] 53486/69 Heading G2A When a flash exposure is to be made, the sensitivity of an exposure controlling photoresistor 9 is varied in accordance with the subject range but independently of the guide number of the flash apparatus to be used. As shown, a variable resistor 11 coupled to the range setter is connected in parallel with photo-resistor 9 when a flash exposure is to be made. Alternatively a mask (40), Fig. 2 (not shown), is used to alter the sensitivity of the photo-resistor. The photoresistor 9 controls the charging time of a capacitor 10, which energizes a diaphragm- or shuttercontrolling electromagnet 6. |
