Patent ID: 7773872

Claim:
A camera capable of mounting a photographic lens having a diaphragm, the camera comprising: a mirror capable of a mirror move up; a defocus amount detection unit configured to detect first information corresponding to a defocus amount, from light passing through the photographic lens mounted on the camera; an acquisition unit configured to acquire second information corresponding to an image-forming position from a lens position output unit provided on the photographic lens; and an image-forming position prediction unit configured to predict a change in the image-forming position based on a change in the second information and a plurality of the past first information stored in a memory, wherein the image-forming position prediction unit predicts the image forming position in consideration of third information corresponding to time required for diaphragm driving that is acquired from a diaphragm driving time prediction unit provided on the photographic lens, in case where the time required for the diaphragm driving is longer than the time for the mirror to complete the mirror move up.