Thanks for the answer. That clears things up. I usually set the ISO manually but thought I would try the auto setting on the Xpan now that I have a camera that is able to use it.
The Silvermax is an excellent film and I would hate not to be able to use it in the Xpan. I will just set the speed manually.
Yes, Silvermax is my favorite film. I bet it would look phenomenal in the right hands, especially when those hands are gripping an Xpan!