Encyclopedia > Focal length

Article Content

Focal length

The focal length of a lens is the distance from the lens to the focus.

Standard lens[?]

Telephoto lens

Wide angle lens

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

BBC News 24

... of running BBC News 24 channel, with so few viewers. Their response was to promote the channel through their ordinary channels BBC1 and BBC2, using terrestrial signals, ...