Quote Originally Posted by Stephen Benskin View Post
A quick look through Schaefer's book shows that while he does have coordinates at Δ0.30 log intervals (actually labeled in Zones), he also used graphs with the coordinates labeled every Δ0.20 logs.

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Yeah, that's in a part(s) of the book that I never have gotten into---Specialty Black and White Films, Alternative Processes, etc.....but within the context of the ZS and testing discussions, it'll be found the other way----I should've been more specific than just referrencing Shaefer alone.