wherein an amount of defocusing performed by {HEAD ~ said means} for {TAIL ~ defocusing} and an adjustment of said gain by said means for adjusting are dependent on a content of said composite signal 
for
wherein an amount of defocusing performed by { HEAD ~ said means } for { TAIL ~ defocusing } and an adjustment of said gain by said means for adjusting are dependent on a content of said composite signal
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH