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