Patent ID: 7570298
Filing Date: 2009-08-04
Classification: H04N

Abstract:
1. An image-taking apparatus comprising: an image-pickup device which photoelectrically converts an object image formed by an image-taking optical system including a focus lens; a first detector which outputs a first signal representing a focus state of the image-taking optical system based on a predetermined-frequency component of an output signal of the image-pickup device; a second detector which outputs a second signal corresponding to a defocus amount of the image-taking optical system based on phase difference of two images; and a controller which performs a first focus control for controlling drive of the focus lens such that an in-focus position of the focus lens is searched for based on the first signal and a second focus control for controlling drive of the focus lens such that one of an in-focus position and a drive amount of the focus lens is determined based on the second signal, wherein the controller selects the first focus control in priority over the second focus control in a case where a value of the first signal is larger than a predetermined value, and wherein, in a case where the second focus control is selected, the controller changes the predetermined value into a value smaller than that at the time of the selection of the second focus control.