The front and rear portions are offset in {HEAD ~ such a way} as to match {TAIL ~ the centerline} of the camera with the centerline of the shoulder and thus aligned with the operators eye 
to match
The front and rear portions are offset in { HEAD ~ such a way } as to match { TAIL ~ the centerline } of the camera with the centerline of the shoulder and thus aligned with the operators eye
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH