Just found something interesting. In Kodak's publication G-1, Quality Enlarging with Kodak B/W Papers, they have a Dorst type reproduction diagram, but with a few changes from the one found in Kodak Professional Black-and-White Films. This one isn't fudged. It uses the statistically average luminance range. A luminance range of 2.20, not 2.10. Flare is 1 stop and is listed as "Moderate Flare Level Lens." The camera image has a illuminance range of 1.90. In Professional Films, the illuminance range is 1.85 and the flare was a little over 2/3 stop. They needed to do this to have the 2.10 subject luminance range calculate down to the CI 0.56, which both examples use.
Kodak Gaphic Tone Reproduction.jpg Kodak tone reproduction graphic.jpg
I know this doesn't exactly belong here, but also found this in Quality Enlarging. It appears that I'm not the only one who thinks the visual response to luminance levels is important.
Kodak - Visual Response.jpg
And to finish it off a Subjective Tone Reproduction diagram.
Subjective Tone Reproduction Diagram.jpg
Last edited by Stephen Benskin; 04-17-2013 at 10:11 PM. Click to view previous post history.