Angular aperture
Appearance
The angular aperture of a lens is the appearant angle of the lens aperture as seen from the focal point:
where is the focal length, and is the diameter of the aperture.
See also: f-number, numerical aperture
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The angular aperture of a lens is the appearant angle of the lens aperture as seen from the focal point:
where is the focal length, and
is the diameter of the aperture.
See also: f-number, numerical aperture