| 摘要 |
PURPOSE:To output a signal which gives an optimum lens stop position, by determining the output, which determines the lens-stopping position, in consideration of not only distance measurement information but also exposure information, the depth of field, etc. CONSTITUTION:In the pan-focus mode, a signal of high level 1 is inputted as a signal PF to cut off a transistor TR 6. Therefore, a distance measurement signal VX given to a buffer amplifier 2 and an output signal V0 of an output terminal 16 are made independent of each other. Similarly, in the default mode, a signal DEF is set to 1 to cut off the TR 6. The distance value of a voltage VP in the pan-focus mode is set to the middle between the close distance and the far distance, and the distance value of a voltage Vd in the default mode is set to the infinity or near it. Thus, the lens-stopping position is determined in consideration of not only distance measurement information but also exposure, the depth of field, etc. to output the signal which gives an optimum lens-stopping position. |
