Archived posting to the Leica Users Group, 2000/01/21

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Subject: Re: [Leica] .... flatness .....
From: "Jacques Bilinski" <jbilin@axionet.com>
Date: Fri, 21 Jan 2000 19:28:19 -0800

.  Or equivalently, the
> set of points in the object space that are brought to sharp focus on
> the film plane form a curved surface rather than a plane.  With a
> plane subject or a subject at infinite distance the net effect is that
> when the center is in focus the edges are out of focus, and if the
> edges are in focus the center is out of focus.
>
I've read statements to the effect "I don't take pictures of documents, etc.
I take pictures in the 3 D world. Therefore flatness of field doesn't matter
to me" a few times on this list. Is there any valid logic to this?