An imaging device includes an APD filter. A first program diagram is selected in a case in which the APD filter is not disposed, and a second program diagram is selected in a case in which the APD filter is disposed. A set of an imaging diaphragm value AV and an imaging shutter speed TV is determined on the basis of an exposure value obtained from a photometric value obtained from a photometric unit. The first program diagram is a multiple-stage diaphragm type program diagram. In the first program diagram, diaphragm values AV take discrete values at an interval of a first value. In the second program diagram, a part of corrected diaphragm values, which are obtained by correcting diaphragm values of the first program diagram on the basis of optical characteristics of the APD filter, are thinned out so that each interval has at least a second value.