Hi Joe,
To me the exposure scale is the number of differentiated steps that print
with a paper/emulsion when exposed through a standardized step tablet. You could
have a lot of steps and still not have that high of print density. I think
this is consistent with other writings? If not, correct me. Alternatively,
I consider a negative to have a given "density range"—since a STANDARD step
tablet is a fancy negative, it has a density range also. In my book I use the
two terms as I have described them, but I certainly don't take credit for the
definition...I think that goes to someone probably long dead by now.
Best Wishes,
Mark Nelson
www.PrecisionDigitalNegatives.com
In a message dated 12/1/05 1:52:30 PM, jsmigiel@kvcc.edu writes:
>
> Mark,
>
> Obviously there is a difference between refective and transmissive
> densities, separating (sic) pigment strengths/degrees of shading or tint
> (or whatever you'd like to call that) from the concept of stops/steps of
> exposure and/or exposure scale.
>
> In order us to all be on the same page, the terms need precise working
> definitions. How do you define "exposure scale" in your PDN System or
> in traditional processes? What criteria are used? What are the limits?
> Do you consider "exposure scale" to be equal to the "negative density
> range" (which IMO is a problematic description based on varying
> definitions by different authors), maximum to minimum transmissive
> density printed, 90% of d-max to some minimum density above paper white,
> or ???
>
> Joe
>
Mark Nelson
Precision Digital Negatives
Received on Thu Dec 1 23:28:19 2005
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