Archived posting to the Leica Users Group, 2000/11/09

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Subject: [Leica] Perspective etc.
From: Oliver Bryk <obryk@flash.netdex.com>
Date: Thu, 09 Nov 2000 17:04:57 -0800

Date: Thu, 09 Nov 2000 12:36:39 -0500
From: "M.E.Berube" <MEB@goodphotos.com>
Subject: Re: [Leica] Re: DOF
Message-ID: <5.0.0.25.0.20001109122440.00aab280@206.34.200.40>
References:

At 06:25 AM 11/9/00 -0800, you wrote:
>If you crop a picture shot with a wide angle lens and then enlarge it
>so it is comparable to a print made through a longer lens, the DOF
>will be the same in both prints.  The actual lens doesn't affect DOF.

um...not to be argumentative, but i disagree...
I am considering DOF to be the point of nearest acceptable focus to the
point of farthest acceptable focus in any given image.  Like
Perspective,
it is set on the negative as a latent image by your choice of lens and
aperture. Nothing you do to it during or after development of the
negative
can change the DOF (or perspective such as apparent background
compression.) You can change Composition and other characteristics
(Gamma,
RGB, hue, contrast, etc..) in the wet or digital lab, but Depth of
Field,
Focus and Perspective are determined in camera.

Carpe Luminem,
Michael E. Berube

well, I'm sorry to have to disagree with that comment....AFAIK
perspective is solely determined by the position of the camera relative
to the subject. Perspective is not a function of camera, lens or
aperture.
Oliver Bryk