Your basically right, but I'm talking more about image illuminance, Eg. Although the subject illuminance is part of it. So the equation is more like Hg = Eg x t. So what then is Eg, and what is Hg (g = mean)?
Originally Posted by Michael R 1974
Last edited by Stephen Benskin; 05-09-2013 at 08:37 AM. Click to view previous post history.