I've got a roll of film in the F5 right now but I'll have to look at that. The F100 does have six contacts and like you say it's possibly newer enough to take advantage of all of this (F5 in '96 and F100 in about '99).

Interesting that you mention the noise of the F100, I never noticed it until I went to the S2 digital (no film advance) and the F5 (different sound, a little quieter too). I don't have the Photo Secretary software but there's a lot you can do with it - not sure I need it though.

Thanks for the info!