Quote Originally Posted by Stephen Benskin

Paper has a gradient of around 2.00, while film has a gradient around 0.50. Film takes the average scene of around 7 stops and reduces it on the negative to around 3 1/3 stops. The paper extends it back to the seven stop range (DR 2.1). That means a one stop density difference on the paper equals a 1/2 stop DR from the negative or in your case a timed exposure. And a 1 stop DR on the negative equals a two stop density difference on the print. It's late, so I may not be expressing this concept too well.

I think you lost me there...... DR ? ( Dynamic Range? What units?) How does the paper and the film DR relate? There is an expnsion and a contraction going on?