| 摘要 |
PURPOSE:To determine based on photometric information by providing the titled device with a correcting value storing means for photometric information and a means for selecting and outputting a correcting value corresponding to a radiation angle and obtaining the correcting value from a storing means. CONSTITUTION:At the time of turning on a switch 1, the voltage of a battery 2 is boosted by a boosting circuit 3 to chage capacitors 4, 8. When a shutter button signal (a) is inputted from a camera to a light emission control circuit 16, a trigger circuit 5 is driven by a signal (b), a discharge tube 6 for preemission emits light, the light is reflected by an object 7, measured by a photodiode 17 and a photometric circuit 8 and converted by an A/D converter 20 to send information (c) to a microcomputer 21. A prescribed program has been already written in the microcomputer 21 and diaphragming information A is calculated based on the information (c) and supplied to the camera. In said constitution, proper diaphragming information can be determined on the position of object only by one preemission. |
