An amount of defocusing performed by the defocusing mechanism and {HEAD ~ a gain adjustment} by {TAIL ~ the gain adjustment device} are dependent on a content of the composite signal 
by
An amount of defocusing performed by the defocusing mechanism and { HEAD ~ a gain adjustment } by { TAIL ~ the gain adjustment device } are dependent on a content of the composite signal
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH