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