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