Acquired is a photographed image with a framing intended by a photographer. There is provided an imaging system including an operation detection unit for detecting a photographing operation by a photographer; an imaging unit for acquiring a through image prior to the photographing operation and acquiring an actually photographed image with a photographing field angle wider than a photographing field angle set by the photographer when the photographing operation is performed; a framing information acquiring unit for acquiring framing information created based on the through image when the photographing operation is performed, and related to framing in time of the photographing operation or immediately before the photographing information; and a trimming unit for trimming the actually photographed image acquired by the imaging unit based on the framing information.