By way of example, {HEAD ~ a five lens system} can perform magnification functions by producing distortion that expands the image in the center of the field of view and compresses the image in the periphery of {TAIL ~ the field} of view 
By way of example , { HEAD ~ a five lens system } can perform magnification functions by producing distortion that expands the image in the center of the field of view and compresses the image in the periphery of { TAIL ~ the field } of view
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH