Archived posting to the Leica Users Group, 2000/08/24

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Subject: Re: [Leica] Zone V and greycard
From: John Collier <jbcollier@home.com>
Date: Thu, 24 Aug 2000 07:36:12 -0600
 
Hmm....I thought the 10 zones of the Zone system were based on the
limitations of the paper not the film. The latest Photo Techniques has an
excellent article explaining this somewhat better.

John Collier

> From: "Erwin Puts" <imxputs@knoware.nl>
> 
> Adams simply used the grey value as his middle Zone V and added equally
> spaced steps on either side, which is almost permissable as film
> densitomerty goes. His shortcoming is that he assumed the density range of
> the film to match the range of reflectance values in nauture.