Archived posting to the Leica Users Group, 1998/10/03

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Subject: Re: [Leica] Leica-Users List Digest V3 #340
From: Dennis Painter <dwp@deltanet.com>
Date: Sat, 03 Oct 1998 20:23:05 -0700
 
Alexey Merz wrote:
> 
> Does anyone here know how Leica calculates its depth of field scales?
> Specifically, what size is the circle of confusion used in Leica's
> calculations?
> 
> I've read that Canon and Nikon use 0.03 mm (or at least they did, back
> when their lenses *had* real DOF scales), and that Zeiss is more
> conservative, using 0.025 mm.
> 

Last I looked it was 1/30mm for Leica

Dennis