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