| http://www.w3.org/ns/prov#value | - Although in FIGS. 4 and 6 the plurality of sub analog switches SW1 ' to SWm ' are provided, it is also possible to connect one sub analog switch to the exposure readout line ld at a point A. Further, the main analog switches SW1 to SWm can be used in common to the exposure detection and the video signal readout by the use of such an arrangement as shown in FIG. 8 in which a changeover switch SW' i
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