Archived posting to the Leica Users Group, 1998/05/24

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Subject: Re: [Leica] Fast M6 Focusing - Was Something Else!
From: TEAShea <>
Date: Sun, 24 May 1998 08:48:39 EDT

 Even if you have a 25 foot zone of apparent focus, there is still only a
 sliver  of that zone that is in perfect, super sharp focus, right? >>

Correct - There is only one plane that is in perfect focus.  In front and
behind that plane is an area of "accceptable focus" - which means that it is
out of focus but by an amount that is acceptable.  Of course the question is
what is acceptable.  

Tom Shea