This is basically what I said in my *very first* post on this subject
quoting the Wiki article here:
<http://en.wikipedia.org/wiki/Normal_lens> which says in part:
-------------------------------------------------------------
A lens with a focal length about equal to the diagonal size of the film
or sensor format is known as 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; this angle of view is
about 53° diagonally.
-------------------------------------------------------------
I suspect no one actually read it. :-)
Chuck Norcutt
On 5/11/2011 12:01 PM, Ken Norton wrote:
> AF wrote:
>> Straw man indeed but the point I was making was that the eye is a very
>> different thing.
>> That peripheral vision is critical to the way that the eye and brain operate.
>
> I believe we are mixing intents as well as definitions when we try to
> imply that a "normal" lens somehow mimicks the overall
> angle-of-coverage of the human eye.
>
> If I recall correctly, the angle-of-view of the lens considered
> "normal" is actually defined by the typical viewing experience of the
> displayed image. Inotherwords, the print size, as viewed from a proper
> distance will yield a similar angle-of-view as if you were viewing the
> subject in real life.
--
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