Patent ID: 8902349
Filing Date: 2014-12-02
Classification: G02B,H04N

Abstract:
1. An image pickup apparatus which is capable of video photography, having an image pickup optical system which can be mounted or fixed, and an image pickup element in which, pixels having a photoelectric converter are arranged in rows two-dimensionally, comprising: a calculating section which calculates a correction value from an accuracy of defocus detection, the accuracy of defocus detection denoting a variation of focusing; a computing section which computes an estimated defocus amount which has been estimated using the accuracy of defocus detection; a correcting section which corrects a current defocus amount, to reduce an absolute value of the current defocus amount by subtracting the correction value from the estimated defocus amount; a lens-drive amount calculating section which calculates a lens-drive amount based on a result from the correcting section; and a controller which, at the time of video photography, carries out focusing successively by using the current defocus amount and the lens-drive amount obtained from the computing section, the calculating section, and the correcting section.