1. A photometry device for a camera, comprising: a normal light sensor having spectral sensitivity characteristics close to visual sensitivity characteristics; a plurality of calorimetric sensors having spectral sensitivity characteristics that are different from those of said normal light sensor; an exposure amount determining system that determines an exposure amount of an object in accordance with an output of said normal light sensor; a colorimetry system that judges a color of the object in accordance with the outputs of said plurality of calorimetric sensors; an external light sensor that measures an external light illuminating the object at spectral sensitivity characteristics corresponding to each of said plurality of colorimetric sensors, said colorimetry system judging the color of the object by compensating the outputs of said plurality of calorimetric sensors based on the outputs of said external light sensor; a compensation amount determining system that determines an exposure compensation amount in accordance with the color judged by said colorimetry system; and a controller that compensates for the exposure amount determined by said exposure amount determining system in accordance with the exposure compensation amount.