Here is a series of diagrams showing how a four progressive exposures affects the reproduction.
Diagram 1: Exposed at the fractional gradient point. The reproduction curve remains below the reference line
Diagram 2: Exposed at 0.10 over Fb+f. The reproduction curve looks very similar to the classic preferred reproduction curve.
4 Quad - Exposure Series 1.jpg
Diagram 3: Exposed 1 stop over 0.10 over Fb+f. There is increased contrast in the shadows and midtones but at the expense of the higher values which show increased compression.
Diagram 4: Exposed 2 stops over 0.10 over Fb+f. There is some additional increase in shadow contrast. The differences are subtle. Parts of the midtone contrast has been reduced but are still greater than the original scene, and the higher values show a very slight decrease in contrast. It's questionable whether there would be a perceptible difference in the print from diagram 3.
4 Quad - Exposure Series 2.jpg
Last edited by Stephen Benskin; 04-21-2013 at 06:57 AM. Click to view previous post history.