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DPR Forum

Welcome to the Friendly Aisles!
DPRF is a spin-off of dpreview. We are a photography forum with people from all over the world freely sharing their knowledge and love of photography. Everybody is welcome, from beginners to the experienced professional. From smartphone to Medium Format.

DPRF is a community for everybody, every brand and every sensor format. Digital and film.
Enjoy this modern, easy to use software. Look also at our Reviews & Gallery!

F stops and aperture size

Not scientifically valid as applied to photo exposures. The only factors that count are the intensity of the light, the size of the aperture and the distance from the lens to the film plane. (assuming the lens is clean and clear and no filters are in the way, of
 
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