Camera for use by photographer, has light detecting units connected to comparison unit, and buzzer controlled by comparison unit for emitting warning signal if difference between lights from light detecting units exceeds set point

摘要

The camera has light detecting units (1-3) with light measuring cells (1C-3C) coupled to a comparison unit (8). A buzzer (9) is controlled by the comparison unit for emitting a warning signal if difference between lights from light detecting units exceeds a set point. A capacitance unit, resistance unit, photodiode and amplifier of the cells transform a quantity of light received by the cells into an electrical parameter at an output.