A method of controlling an imaging apparatus that includes an image sensor configured to receive object light via at least one member of a focus detection plate for diffusing the object light that has had a primary image formed, a frame configured to block a peripheral portion of light that has been diffused by and transmitted through the focus detection plate, and a display device configured to display information related to photographing, the method comprising:
- calculating a resolution of the signal corresponding to each of the spectral sensitivity characteristics on the basis of an output signal of the image sensor when a member in the vicinity of a primary imaging plane serves as an object;
- and
- generating an image with a weight of a signal corresponding to each type of spectral sensitivity characteristics of the image sensor output by the image sensor being varied on the basis of the resolution of the signal corresponding to each of the spectral sensitivity characteristics,
- wherein the weight of a signal is increased as the resolution of the signal corresponding to the spectral sensitivity characteristics is higher.