A method for removing a shadow from an aerial or satellite photograph, includes collecting aerial or satellite photographs, by the photographing information collecting unit; extracting buildings at each of the collected aerial or satellite photographs, by the building information extracting unit; and estimating a shadow area cast by the extracted buildings, by the shadow area estimating unit. In a preferred embodiment, the size of primary game information such as the images of playing cards or the like may be changed relative to secondary game information such as pay table, credit, and other information. The first lens unit consists of, in order from the object side, a first lens component with a positive refracting power, a second lens component with a negative refracting power, and a third lens component with a positive refracting power.