A telephoto lens with focal length of 120mm has f-numbers
A telephoto lens with focal length of 120mm has f-numbers ranging from f/2.8 to f/22.
Part A What is the diameter of the lens aperture at f/2.8? in millimeters
Part B What is the diameter of the lens aperture at f/22?
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A telephoto lens with focal length of 120mm has f-numbers ranging from f/2.8 to f/22, What is the diameter of the lens aperture at f/2.8? in millimeters
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