Originally Posted by Roger Cole
One minor point - some 645 cameras (Bronica, I think) get 16 shots on a roll but the Mamiya 645 gets 15, or at least my Pro does.
I don't know about the RF 645, but the ETR series gets 15. The Pentax 645 gets 16.
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.