1. An image capture apparatus, which generates an image, a dynamic range of which is expanded, by composing two images having different exposure amounts, comprising: an imaging unit configured to output a first image and a second image which follows the first image by imaging operations that sequentially apply two different exposure amounts; a composing unit configured to generate a composed image, a dynamic range of which is expanded, by composing the first image and the second image; a generation unit configured to generate tone compression characteristics based on the first image and an image generated by reducing a resolution of the first image; and a tone compression unit configured to compress tones of the composed image using the tone compression characteristics generated by said generation unit.