Quote Originally Posted by Wishy View Post
... (Rather than the 5.6 as I'm told the light falloff is less dramatic) ...
You have been misinformed. Check Schneider's own illumination curves, and you will see that the falloff is practically identical, when you adjust for the larger image circle of the 5.6 version. That means that at the same distance from the lens axis, the falloff is the same. If anything the f:8 version is very slightly BETTER, within the coverage needed for a 4x5" film size.