Sinar F+ vs. F1 or F2?

What is the main difference between a Sinar F+ and the F1? Also the same question for the F2.
There are some great deals to be had on F's and F+'s.

Good question.

I have been trying to find a manual for the SINAR F series of cameras for a while. While I have an F or F+ and an F1, I am not really sure of the distinctions. Even on the SINAR Group here on APUG, there is not really very much information available.

Another fellow provided to me a quick description of the variations as he understood them. I will see if he minds if I port his information over to the SINAR Group.