Imaging device, control method of imaging device, and control program of imaging device to change zoom tracking information based on contrast values

Abstract

A CPU executes a zoom tracking control program to function as an acquisition unit that acquires a focal length of an imaging lens from a state of a zoom lens; and a control unit that performs first control of performing control to change a position of a focus lens along an optical axis direction according to the acquired focal length on the basis of a zoom tracking curve represented by tracking data representing a correspondence relationship between the focal length and a focus position according to a subject distance, and second control of acquiring contrast information representing contrast of a captured image a plurality of times during execution of the first control and performing control to change the zoom tracking curve used in the first control on the basis of a change of contrast values represented by a plurality of pieces of the acquired contrast information.