Abstract: An imaging apparatus includes an image sensor, an acquiring unit, and at least one processor. The image sensor is capable of acquiring, from an imaging surface that captures an object image formed by an optical system, first and second paired signals which are respectively acquired by pupil division in first and second directions different from each other. The acquiring unit acquires first and second defocus amounts from phase differences between the first paired signals and between the second paired signals, respectively. The at least one processor functions as a detecting unit and a deciding unit. The detecting unit detects an imaging object in an imaging frame. The deciding unit decides, based on the detected imaging object, at least one defocus amount to be used in focus control for the optical system from the first and second defocus amounts.

Abstract: An image pickup apparatus executes a focus detecting task configured to detect a defocus amount by a signal acquired from an image sensor, a predicting task configured to calculate information corresponding to a predicted image plane position by a prediction calculation using the defocus amount detected a plurality of times and position data of a focusing element and time data when the defocus amount is detected, and a controlling task configured to calculate a driving amount of the focusing element using the information corresponding to the predicted image plane position, to calculate a driving velocity for the focusing element according to the driving amount, and to provide a control such that the focusing element is driven at the driving velocity, wherein the controlling task calculates the driving velocity in order that an image plane position of the imaging optical system approaches the predicted image plane position.

Abstract: An image pickup apparatus executes a focus detecting task configured to detect a defocus amount by a signal acquired from an image sensor, a predicting task configured to calculate information corresponding to a predicted image plane position by a prediction calculation using the defocus amount detected a plurality of times and position data of a focusing element and time data when the defocus amount is detected, and a controlling task configured to calculate a driving amount of the focusing element using the information corresponding to the predicted image plane position, to calculate a driving velocity for the focusing element according to the driving amount, and to provide a control such that the focusing element is driven at the driving velocity, wherein the controlling task calculates the driving velocity in order that an image plane position of the imaging optical system approaches the predicted image plane position.