Abstract: A light measurement device includes a photoelectric converter for receiving light from an object to be measured and converting the light to a measuring electrical energy in accordance with the intensity of the light, an offset amount measurement device for measuring the offset amount of the photoelectric converter, temperature measurement device for measuring a first temperature of the photoelectric converter when measuring the offset amount, and a second temperature of the photoelectric converter when measuring the light from the object, a memory device for storing a characteristic of the photoelectric converter with respect to temperature, correction amount calculation device for calculating a correction amount based on the characteristic, the first temperature, and the second temperature, and a light intensity calculation device for calculating a light intensity based on the measuring electrical energy, the offset amount, and the correction amount.

Abstract: A photographic enlarger for carrying out a printing operation using exposure data fed directly from an external analyzer by converting the data into suitable exposure data for the enlarger. The enlarger can function efficiently even when a condition of the optical system of the enlarger, for example, the magnification or aperture size, of the optical system, is changed.