Question: Question 2 3 ( 4 points ) A camera has a lens of focal length 5 0 mm and a speed of f 2 .

Question 23(4 points)
A camera has a lens of focal length 50 mm and a speed of f2.0. What is the diameter of the lens?
13 mm
25 mm
50 mm
100 mm
150 mm
Question 2 3 ( 4 points ) A camera has a lens of

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