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