flynngraphics.ca · 2019-10-26 · 300mm f/4.5-5.6 USM). The aperture of a lens is the open- ing...
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flynngraphics.ca · 2019-10-26 · 300mm f/4.5-5.6 USM). The aperture of a lens is the open- ing through which light passes to the film. The maximum aperture value of a lens tells