{HEAD ~ An apparatus} for positioning {TAIL ~ the eyepiece} comprises a photographic positioning cam sleeve formed with a photographic positioning cam slot, and a dioptry adjusting cam sleeve formed with a dioptry adjusting cam slot 
for positioning
{ HEAD ~ An apparatus } for positioning { TAIL ~ the eyepiece } comprises a photographic positioning cam sleeve formed with a photographic positioning cam slot , and a dioptry adjusting cam sleeve formed with a dioptry adjusting cam slot
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL 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