In the camera device, {HEAD ~ virtually all} of the light that converges on a point in {TAIL ~ space} is captured 
In the camera device , { HEAD ~ virtually all } of the light that converges on a point in { TAIL ~ space } is captured
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH