Archived posting to the Leica Users Group, 1997/12/04

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Subject: Re: [Leica] RE: soft focus vs out -of- focus in an ultimate sharpness world
From: Eric Welch <ewelch@ponyexpress.net>
Date: Thu, 04 Dec 1997 08:11:12 -0600

At 07:01 AM 12/4/97 -0600, you wrote:

>Does the rule of thumb of 1/5 the focal length as being the smallest f stop
>to use without having diffraction problems work?

Yes, that would. But that contradicts what was said before that diffraction
is focal length independent, which I've always been told isn't true. I'm
hoping to be enlightened.
==========

Eric Welch
St. Joseph, MO
http://www.ponyexpress.net/~ewelch

Pi R Squared? No Pi R round, Cornbread R Square!