{TAIL ~ A dioptry adjusting pin} is received in the cam slots and, as a photographing device is mounted on the endoscope, is driven by {HEAD ~ means} of its engagement with the cam slots to position the eyepiece at a predetermined photographing position 
{ TAIL ~ A dioptry adjusting pin } is received in the cam slots and , as a photographing device is mounted on the endoscope , is driven by { HEAD ~ means } of its engagement with the cam slots to position the eyepiece at a predetermined photographing position
TAIL TAIL 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 HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH