Quote Originally Posted by markbarendt View Post
..........the darkest part of the subject matter defines the exposure settings and the difference between the darkest and lightest defines the processing.
Well, it's the basic expose for the shadows, develop for the highlights scenario............It's primarily the "placed" luminance value in the scene that determines the camera settings (not always the darkest part)..........and, of course, it's where the most desired textured or slightly textured high value "falls" on the gray scale that dictates processing. By controlling the shadows with exposure and highlights with development, the mid-tones are sure to fall as predicted on the gray scale relative to the "placed" luminance value and be quite manageable and easily manipulated in printing. That's why I don't bother with concerning myself with specific density values between the "effective" speed point at Zone I and the calibration value that defines my "normal" development time, which is a target density of 1.3D at Zone VIII.