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