To provide a controlling apparatus for a photographing system that enables effective use of a memory zoom function regardless of whether a zoom position is within an optical-zoom region or a digital zoom region. The present invention provides a controlling apparatus for a photographing system having an optical-zoom region and a digital zoom region, including a zoom controlling unit for making the photographing system perform a memory zoom operation which is a zoom operation to a zoomed state stored in a storage unit. In addition, the zoom controlling unit makes the photographing system perform the memory zoom operation from a first zoomed state corresponding to one of the optical-zoom region and the digital zoom region to a second zoomed state which corresponds to the other zoom region and is stored in the storage unit.