Yes, H is the illuminance at the film plane. E is the camera illuminace. You used the classic simplified exposure equation E = I x t. Are you able to put it to use? What I mean is that that equation is in most photo books, but none of them actually seem to define it or show how it works with examples. So, we think we know what it is about but only in the abstract and not in practical terms.
Originally Posted by Michael R 1974
Last edited by Stephen Benskin; 05-09-2013 at 10:23 AM. Click to view previous post history.