Patent ID: 8203645

Claim:
An image-pickup apparatus, comprising: an image-pickup element that includes first pixels photoelectrically converting an object image formed by a light flux from an image-pickup optical system, and second pixels including plural focus detection pixels photoelectrically converting a light flux divided from the light flux from the image-pickup optical system; a focus detector that detects a focus state of the image-pickup optical system based on outputs from the second pixels; a frequency component detector that detects a spatial frequency component of the object image formed on the first pixels; an image generator that generates, based on outputs from the first pixels, a partial image corresponding to the second pixels of an image obtained by an output from the image-pickup element; and a controller that switches whether or not to cause the image generator to generate the partial image in accordance with the spatial frequency component detected by the frequency component detector, wherein the controller does not cause the image generator to generate the partial image when an intensity of the spatial frequency component is higher than a predetermined value, and causes the image generator to generate the partial image when the intensity of the spatial frequency component is lower than the predetermined value.