This is a comparison between tone reproduction diagrams. The one on the left is from Way Beyond Monochrome and the right is from Photographic Materials and Processes.
WBM and Materials 4 Quad.jpg
In both the WBM and Materials diagram, flare in Quadrant I has pushed the shadow exposure higher up on the film curve, Quadrant II. The major difference is the Materials diagram shows how flare compresses the darker tones, between Quadrant I and Quadrant II, while WBM shows no change.
Both examples also show how the Zone designations are associated with the original subject and not to any specific negative density based on the exposure range from the speed point. This is most noticeable in the Materials diagram with the Zone designations remaining constant even though the exposure range for the shadows is compressed.
Last edited by Stephen Benskin; 01-22-2012 at 02:14 PM. Click to view previous post history.