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