How are the Zone reference lines supposed to work? Are they a through line running from a subject luminance to the paper luminance or are they Zone paper references? If they are Zone paper references, I thought there wasn't a correlation between print Zones and specific reflection densities. If they are a through line, the line would be distorted by the camera image, film and paper curve. Also, I might be reading them wrong, but it looks to me like the exposure labels are backwards. The under doesn't have any portion of the curve touching Zone III and over doesn't have any part of the curve touching Zone VIII.
Originally Posted by markbarendt