Archived posting to the Leica Users Group, 2001/02/08

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Subject: Re: [Leica] DOF
From: shan <web@rimrock.org>
Date: Thu, 08 Feb 2001 14:56:40 -0700
References: <NBBBIDNIGLFOKNLJCPLHCEPBFEAA.danh@selectsa.com>

Mark wrote:

>But i think people who shoot that stuff, large format stop down almost all the
>way anyway.


FWIW, in 5x7, 4x5 and 6x9 I usually TRY not to stop down past the 
diffraction limit of the particular lense - IF it doesn't hammer the DOF 
(hereafter spelled D**). And yes, swings and tilts help to put the 
available depth where you need it. I also have spiffy little charts that 
shows me what f/stop I need in order to reach a particular COC, or to 
reduce COC to a theoretical minimum (diffraction included). A handy deal 
for the mathematically impaired artist :-)

There are two great articles on how to do it in an old Photo Techniques, 
one I believe by the heretofore mentioned Harold Merklinger. I will publish 
the reference if anyone is interested.

shan

In reply to: Message from "Dan Honemann" <danh@selectsa.com> (RE: [Leica] DOF)