Comment Re:Duh? (Score 1) 443
you know you're shooting with 400 speed film. throw a polaroid back with 400 speed polaroid film on your medium or large format camera, and _with the same lighting and exposure settings_ take a polaroid shot. it develops in a minute or so, and you can see if you need to adjust, how your shadows are coming out, if your framing and composition is OK, etc.
it's like a very slow LCD back.