1. An image capturing apparatus comprising: an image capturing unit configured to capture images by an image sensor; an acquisition unit configured to acquire information relating to sensitivities of the image sensor used for capturing the images; a composition unit configured to add a plurality of images for generating a composite image; and a development processing unit configured to perform development processing of data of the composite image generated by the composition unit; wherein a plurality of parameters having different characteristics corresponding to the sensitivities of the image sensor are provided as the parameters used for the development processing; further comprising a control unit configured to perform controlling to compare the sensitivities used for shooting the plurality of images and set the parameter corresponding to the highest sensitivity as the parameter used for the development processing.