Archived posting to the Leica Users Group, 1998/12/16

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Subject: [Leica] Viewing filter for B&W
From: "Jack F. Matlock" <>
Date: Wed, 16 Dec 1998 09:01:31 -0500

On Dec. 15 Bee Lian wrote:

"Has anyone used a viewing filter to preview how a scene is 
rendered in
B+W tonal values? Care to comment on it's usefulness if one is 
trying to
teach the eye to see in B&W values. Ansel Adams suggested using 
filter for newbies in B&W photography. B&H sells one by Peak for 

I have used such a filter produced by Zone VI and currently 
marketed by Calumet.  It is quite useful for judging tonal 
separations -- for example, buildings against the sky and the