Patent ID: 8559805
Filing Date: 2013-10-15
Classification: G03B

Abstract:
1. An image-pickup apparatus comprising: a first detector which generates first information corresponding to a contrast state of a picked-up image; a second detector which detects second information corresponding to a subject distance based on a detected shift amount between two images using a phase difference detection method; and a controller which controls a focus lens cyclically using the first information and controls the focus lens using the second information, wherein the controller moves the focus lens in a direction in which the contrast state of the picked-up image increases, wherein the controller controls the focus lens using the second information when a change amount of the contrast and a change amount of the subject distance exceed each threshold value respectively during a control of moving the focus lens using the first information without using the second information so that the contrast state of the picked-up image increases, and wherein the controller restricts the control of the focus lens using the second information when at least one of both the change amount of the contrast and the change amount of the subject distance do not exceed the each threshold value during the control of moving the focus lens using the first information without using the second information so that the contrast state of the picked-up image increases.