Re: [PRODIG] standard focal length

[Kevin Horton]

A "standard"  lens  is one that gives a  perspective which is close to 
what human eye see. This occurs  when the length of the frame diagonal 
is approximately the same as the focal length.

On 23 Nov 2004, at 13:34, Keith Dixon wrote:
 No one seems able to tell me why though
and I was wondering if anyone on the list knows
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