There is provided an ion-exchange membrane comprising an ion-exchange layer made of a cationic polymer andor an anionic polymer and a supporting layer, wherein the ion-exchange layer is formed on the supporting layer by printing. The staging record comprises the transaction information and the retrieval key or code identifies the staging record for finalizing the transaction. Further, in second image-pickup, acquires second image data for the AF area within the image frame according to a second light flux from the object passing through the aperture of the diaphragm when the diaphragm is shifted in one vertical direction with respect to the optical axis.