Quote Originally Posted by Stephen Benskin View Post
The tone reproduction diagram shows the original subject, camera image, negative characteristic curve, paper characteristic curve, and the reproduction curve. There's no place for latitude to hide.

From your original post, it sounds like you are basically talking about the tone reproduction curve.
I'm not saying its hiding. I believe part of what I'm saying is that alternate subject matter placement on the negative isn't normally shown, nor would it be easy to do multiple film curves clearly, on a single windmill illustration.

Also windmills seem to show only how "good" or "normal" or "tested EI" exposures fall. One may be out there somewhere but I can't remember seeing any windmill diagram where a negative's shoulder is shown having an effect on the print, instead the white point on the print normally seems to correspond to a point on the straight line of the negative.