Encyclopedia > Angular aperture

Article Content

Angular aperture

The angular aperture of a lens is the appearant angle of the lens aperture as seen from the focal point[?]:

<math>a = 2 \arctan \frac {A} {2 f}</math>

where <math>f</math> is the focal length, and <math>A</math> is the diameter of the aperture.

Featured Article

Kuru Kuru Kururin

... the level without any accidents. Kururin was released in Japan and Europe but not in the United States. However, because the GBA has no region lockout, European ...