Quote Originally Posted by Kirk Keyes View Post
Paging Dr. Benskin. Paging Dr. Benskin.
OK, he must be off today...
Think about lens flare and its effect on the luminance range. 7 stops in the real world will drop somewhat as the light goes through your lens on its way to the film.
Kirk, thanks for chiming in. Yes, I test with 35mm film. The Stouffer chart I got is intended for 4x5, forcing me to do some adapting. Do you think using sheet film would give different results?

Hmmm, flare will push up the shadow-area, compressing the entire image a little, so I can see why 7 stops would become 6. So Kodak's 5.77 stops in its CI-ruler is close after all. Thanks for pointing that out.