A camera lens is initially set at f/16 for a shutter speed of 1/30 s.If the amount of lighting on the subject is unchanged,and the lens is set at f/5.6,what is the proper shutter speed at this setting?
A) 1/8 s
B) 1/250 s
C) 1/500 s
D) 1/16 s

Question

Quizplus · Accepted Answer

The f-stop change from f/16 to f/5.6 is a 3-stop increase in light (f/16 to f/11 to f/8 to f/5.6). To maintain the same exposure, the shutter speed must decrease by 3 stops, from 1/30 s to 1/60 s to 1/125 s to 1/250 s.

A Camera Lens Is Initially Set at F/16 for a Shutter