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Author Question: Increasing the focal length in a telephoto lens by a factor of nine, while keeping the aperture size ... (Read 125 times)

09madisonrousseau09

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on: Jul 28, 2018
Increasing the focal length in a telephoto lens by a factor of nine, while keeping the aperture size constant, will change the f-number by what factor?
 a. 1/3
  c. 9
  b. 1/9
  d. 3

Question 2

Decreasing the aperture diameter of a camera lens by a factor of three will change the f-number by what factor?
 a. 3
  c. 1/9
  b. 9
  d. 1/3


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meltdown117

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Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

A


09madisonrousseau09

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Reply #2 on: Jul 28, 2018
TY


meltdown117

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Reply #3 on: Jul 28, 2018
You're welcome


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