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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 150 times)

09madisonrousseau09

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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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Answer to Question 1

C

Answer to Question 2

A





 

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