1. An image capture apparatus comprising: a first image data acquiring unit configured to acquire first image data when preliminary light emission is not performed; a second image data acquiring unit configured to acquire second image data when preliminary light emission is performed; a face area detection unit configured to detect a face area of a subject from at least one of the first image data acquired by the first image data acquiring unit and the second image data acquired by the second image data acquiring unit; a luminance comparison calculation unit configured to compare the first image data and the second image data with respect to luminance based on the face area of the subject detected by the face area detection unit and calculate at least one luminance comparison value; and a main light emission amount determination unit configured to determine an amount of main light emission based on the at least one luminance comparison value calculated by the luminance comparison calculation unit.