The user selects maximum gain to cause a scene to go dark at {HEAD ~ a certain low light level} rather than gaining up to {TAIL ~ a noisy image} 
than gaining up to
The user selects maximum gain to cause a scene to go dark at { HEAD ~ a certain low light level } rather than gaining up to { TAIL ~ a noisy image }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL