Decreasing the aperture diameter of a camera lens by a factor of three will change the f-number by what factor?
A) 3
B) 9
C) 1/9
D) 1/3

Name: Decreasing the aperture diameter of a camera lens by a factor of three will change the f-number by what factor? A) 3 B) 9 C) 1/9 D) 1/3
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Question

Quizplus · Accepted Answer

The f-number is the ratio of the focal length to the aperture diameter. If the aperture diameter is decreased by a factor of three, the f-number increases by a factor of three.

Decreasing the Aperture Diameter of a Camera Lens by a Factor