1. An imager comprising: an imaging sensor that creates an image signal by photographing a subject; and an image processor that processes the image signal with visual effects processing so as to create image data, and adds metadata to the image data so as to create an image file, the metadata containing post-processing information that includes information based on the visual effects process; and a recorder that stores the image file; the visual effects process being used in processing the image data; said image processor conducting a post process in which more than one visual effects process is carried out, a new image file is created, and the new image file is stored in said recorder; the post-processing information having post-processing counter and pre-processing information, the post-processing counter indicating the number of times the post process is carried out, and the pre-processing information representing the state of a preprocessed image file prior to post processing.