A user enters an input for selecting an image-capturing mode. The user then captures the image of a target with a desired zoon factor as a target image. An image-capturing device determines a zoom factor for an image to be captured starting from the target image and then captures an image while zooming out to the determined zoom factor. A process of changing the zoom factor and capturing an image is repeated until the smallest zoom factor among determined zoom factors is used. When image capturing of an image of the smallest zoom factor is completed, metadata is created that includes the respective zoom factors of images and relative position information of the images, and the metadata is stored in a memory unit in relation with the data of the captured images.