Patent ID: 6900886

Claim:
A photometric apparatus comprising: a photo sensor which senses light to output light data in accordance with an intensity of the sensed light; a first receiver which allows photosensitivity data to be inputted; an exposure value calculator which calculates an exposure value based on light data from the photo sensor and the inputted photosensitivity; a second receiver which allows a particular calculated exposure value to be designated as a reference exposure value for an actual photographing; an exposure value difference calculator which calculates a difference between a calculated exposure value and the reference exposure value; a gamma characteristic provider which provides a gamma characteristic concerning a relationship between the exposure value difference and a gradation value of digital data; a gradation calculator which finds, based on the exposure value difference and the gamma characteristic, a calculated gradation value of digital data in connection with an object having the calculated exposure value when the object is photographed at the reference exposure value; and an indicator which indicates the calculated gradation value of digital data in connection with the object.