A photographer takes a perfectly exposed picture at an
Chapter 19, Problem 16MCQ(choose chapter or problem)
Problem 16MCQ
A photographer takes a perfectly exposed picture at an f-number of f/4.0 and a shutter speed of 1/125 s. Now he wishes to use a shutter speed of 1/250 s. What f-number should he choose to get a correctly exposed picture?
A. f/2.0
B. f/2.8
C. f/5.6
D. .f/8.0
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