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What are the theoretical minimum and maximum apertures?

Since this is 2 questions (narrowest aperture, and widest aperture, I'm answering this in 2 answers Widest Aperture (fastest f-number) TL;DR: For a photographic camera and lens in air, the fastest ...
scottbb's user avatar
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What are the theoretical minimum and maximum apertures?

Since this is 2 questions (narrowest aperture, and widest aperture, I'm answering this in 2 answers Narrowest Aperture For imaging systems in non-scientific applications (i.e., cameras taking ...
scottbb's user avatar
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What are the theoretical minimum and maximum apertures?

Maximum aperture f/number of conventional lens is 0.35 = SQRT(2)/4, one step faster than 0,5. Not zero, not 0.5, not 0.33. Hope bloggers, commentators and wikipedia will learn that once and for all. ...
patta's user avatar
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