[hgernhardt]

Henry, that's it exactly.

Thanks, I thought that might be the case.

One other issue is the brightness of the lamphouse. When you go from the big surface area of 4x5 down to 35mm, the physical size of 35mm film and the smaller opening in the negative carrier drastically reduces the amount of light available

Makes sense. Thanks for the information! I've been looking for this article for ages now.