System 300 is {HEAD ~ a second two stage imaging system} that compensates for {TAIL ~ the curvature} of field aberration 
compensates for
System 300 is { HEAD ~ a second two stage imaging system } that compensates for { TAIL ~ the curvature } of field aberration
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH