An image capture apparatus can execute automatic focus detection of an imaging optical system, using a signal obtained from an image sensor. First image-forming position information is obtained by performing, using first weights, weighted addition on information regarding image-forming positions of the imaging optical system, the information corresponding to different spatial frequencies. In addition, second image-forming position information is obtained by performing, using second weights, weighted addition on the information. A result of the automatic focus detection is corrected based on a result of a comparison between the first and second image-forming position information. The first weights correspond to an evaluated band at the time of appreciating an image, and the second weights correspond to an evaluated band of the signal used in the automatic focus detection.