The eyepiece can be brought to {TAIL ~ a photographing position} which is within {HEAD ~ the extent} of adjustment of the dioptry 
The eyepiece can be brought to { TAIL ~ a photographing position } which is within { HEAD ~ the extent } of adjustment of the dioptry
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH