Originally Posted by Mike Wilde
You will find that 4x5 film is actually a tiny bit narrower than 4".
A vestigial side effect from the days of film sheaths that had to themselves fit into the earlier glass plate holders.
[Steve beat me to it...]
"Hate is an adolescent term used to stop discussion with people you disagree with. You can do better than that."
—'blanksy', December 13, 2013