1. An image capture apparatus capable of executing automatic focus detection of an imaging optical system, using a signal obtained from an image sensor, the apparatus comprising: an acquisition unit configured to acquire (1) first image-forming position information obtained by performing, using a plurality of first weights and a plurality of third weights, weighted addition on information regarding a plurality of image-forming positions of the imaging optical system, the information corresponding to different spatial frequencies, and (2) second image-forming position information obtained by performing, using a plurality of second weights and a plurality of fourth weights, weighted addition on the information; a correction unit configured to correct a result of the automatic focus detection based on a result of a comparison between the first image-forming position information and the second image-forming position information; and a control unit configured to control a position of a focusing lens that the imaging optical system has, based on the corrected result of the automatic focus detection, wherein the plurality of first weights correspond to a first evaluated band, which is related to characteristics of a captured image and is predetermined, and the plurality of second weights correspond to a second evaluated band, which is related to characteristics of a signal used for the automatic focus detection, and wherein the plurality of third weights respectively correspond to different spatial frequencies and the plurality of fourth weights respectively correspond to the different spatial frequencies, and the smaller the spatial frequency is, the smaller the respective third weight and the respective fourth weight.