Quote Originally Posted by Bill Burk View Post
I thought everything to the left of those lines simply could not be measured because lesser exposures were wiped out by flare.
That's the part which is the construct. It doesn't really exist. What actually happens is flare adds to the shadow exposure. This moves it to the left. In the example for a 2.5 flare factor, the shadow exposure shifts from relative log-H 0 to point A. A 5 filter factor shifts the shadow exposure to B and a filter factor of 10 shifts it to point C. The shadow exposure no longer reaches down to relative log-H 0.

Henry Flare Curve .jpg