Exposure time of a camera lens at the \(\frac { f }{ 2.8 }\) Setting is \(\frac { 1 }{ 200 }\) second. The correct time of exposure at \(\frac { f }{ 5.6 }\) is
A. 0.20 second
B. 0.40 second
C. 0.02 second
D. 0.04 second
Answer:C
Exposure time of a camera lens at the \(\frac { f }{ 2.8 }\) Setting is \(\frac { 1 }{ 200 }\) second. The correct time of exposure at \(\frac { f }{ 5.6 }\) is
A. 0.20 second B. 0.40 second C. 0.02 second D. 0.04 second