| 摘要 |
PURPOSE:To obtain delicately a photometric range, by comparing and calculating an output of the first photometric circuit for photometry of a main object to be photographed of the center part on a photographic picture, and an output of the second plural photometric circuits for photometry of a subordinate object to be photographed in the circumference, and using it as photometric information. CONSTITUTION:A photoelectric converting element PM1 executes photometry of a main object to be photographed, and photoelectric converting elements PN1-PN4 execute photometry of a subordinate object to be photographed. An output of the first photometric circuit LM1 is provided to operational amplifiers OP3, OP4, and is provided to one input terminal of comparators CP1-, CP2- as discriminating reference voltage. An output of the second photometric circuits LN1-LN4 is provided to the other input terminal of the comparators CP1, etc. In case when an output of the element PN1 is remarkably larger than an output of the element PM1, an output of the comparator CP1 is inverted to a low level side, an analog G1 is turned off, contribution to the photometric operation of an output of the circuit LN1 is cut off, outputs of the circuits LN2-LN4 and an output of the first photometric circuit LM1 are calculated by operational amplifiers OP0, OP1 and OP2, and the exposure quantity is controlled. |
