Why is a 50mm FF lens 'normal'?

Started Feb 24, 2013 | Discussions thread
YuriS
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Re: Why is a 50mm FF lens 'normal'?
In reply to jon404, Feb 28, 2013

Why not read Wiki? Sometimes it has appropriate answers:

"For still photography, a lens with a focal length about equal to the diagonal size of the film or sensor format is considered to be a normal lens; its angle of view is similar to the angle subtended by a large-enough print viewed at a typical viewing distance equal to the print diagonal;[2] this angle of view is about 53° diagonally".

http://en.wikipedia.org/wiki/Normal_lens

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