An image sensing apparatus comprises an image sensing unit capturing an object image, a saving unit saving a captured image data, a development processing unit reading out the image data and execute development processing for the image data to generate new image data, a setting unit setting a parameter for the development processing, a display unit displaying a development processing result and an operation unit allowing a user to perform one of enlargement and reduction of the displayed image, wherein when a first parameter for which optical system correction processing is performed and a second parameter for which the correction processing is not performed are set, the development processing unit executes development processing, to which the first parameter is applied, when a change to enlarged display is not made, and executes development processing, to which the first and second parameters are applied, when a change to enlarged display is made.