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 a parameter corresponding to the highest sensitivity of the plurality of parameters as the parameter used for the development processing.