That's not exactly correct. The darkest point in determining the LER of a paper is 90% D-Max. The idea is that the average shadow value will look natural if placed on this point. Within reason, it doesn't matter where it falls on the film curve.
Originally Posted by markbarendt
The idea of minimum exposure is to offer higher film speeds, reduce graininess, obtain maximum sharpness, and maintain reasonable printing times. There isn't anything intrinsic from a tone reproduction standpoint about it. See attachments. The reason why film speed is determined from the shadows is because it was determined shadow reproduction was critical to image quality.
If I understand the example of the art's fair correctly, it should be more about contrast than exposure placement. The effect you describe can just as easily be accomplished by exposing well and printing down.
Last edited by Stephen Benskin; 05-26-2011 at 11:19 PM. Click to view previous post history.