Quote Originally Posted by mfobrien
This post got me looking on my bookshelves. I have the first edition, 6th printing of Pictorial Lighting by Mortensen. A very neat book.
That is one of the two best sources for an explaination of his exposure system. I've noticed that the whole secret is the fact that rearly does he go over a lighting ratio of 4:1. He take a flat subject and expands the mid tones
and highlights. BTW, Barry Thornton did try the Mortensen technique with a ringlight("Edge of Darkness"; pg.s 142-145).