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[OM] Re: Depth of field calculator

Subject: [OM] Re: Depth of field calculator
From: AG Schnozz <agschnozz@xxxxxxxxx>
Date: Wed, 22 Jun 2005 19:01:04 -0700 (PDT)
> Are you sure that this isn't simply that the "plane" of focus
> isn't flat 
> but is a curve instead?  I think most non-macro lenses exhibit
> some 
> curvature in the plane of focus.  Are the ZD's just more-so in
> this 
> respect or is there truly something else going on?

I have found the 14-54 to be remarkably "flat-fielded" and quite
suitable for copy work.

A way of illustrating what I was talking about with "plane of
focus" vs "zone of focus", think of a traditional lens that has
a "plane of focus" one sheet of paper thick.  The ZD lens'
"plane of focus" is more like an 80 page magazine.

AG


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