Archived posting to the Leica Users Group, 2005/06/10

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Subject: [Leica] Gray card not 18% Erwin
From: john.o.newell at comcast.net (John O. Newell)
Date: Fri Jun 10 10:43:03 2005
 
> Over the years one of the more interesting things I've learned on the LUG
> was that the gray card is not real middle gray.

I've heard John Shaw say the same in a workshop.  There may be something in 
one of his books on this, but I don't have any of them handy this time of 
day.

John Newell
Replies: Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] Gray card not 18% Erwin)