Patent ID: 7764876

Claim:
An image-pickup apparatus configured to capture an image formed by an image-pickup optical system on an image-pickup element, the apparatus comprising: a first detector configured to generate first information corresponding to a contrast state of the captured image; a controller configured to repeatedly control a focus lens unit using the first information; a second detector configured to output a second information corresponding to an object distance; and a position detector configured to detect a position of the focus lens unit, wherein, while the controller is repeating the control of the focus lens unit using the first information, if a difference between the position of the focus lens unit detected by the position detector and an in-focus position calculated using the second information is a first value that is changed depending on third information corresponding to a focal length of the image-pickup optical system, the controller moves the focus lens unit towards the in-focus position calculated using the second information, and if the difference is a second value that is less than the first value, the controller repeats the control of the focus lens unit using the first information without using the second information.