For a 25 mm tube, {HEAD ~ the equivalent} of {TAIL ~ approximately 380,000 rangefinders} can be achieved 
of
For a 25 mm tube , { HEAD ~ the equivalent } of { TAIL ~ approximately 380,000 rangefinders } can be achieved
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH