Quote Originally Posted by markbarendt View Post
I think many times we get to hung up on thinking that "appropriate" means "exact" or "one right exposure setting", for example to match densities with the standard Ansel set.

IMO appropriate camera exposures fall inside a range, not at a given point.
Yes, in Jones et al they demonstrated a plateau in picture quality with increasing exposure when negatives are used for contact prints. However, smaller negatives that would be used for enlarged prints, there was usually an optimum exposure. This is because the film tends to lose resolution as silver density builds up. Though, you could consider it a plateau with a peak value.