Originally Posted by David Brown
OK, getting back to the OP question; I don't think this is really answerable, but I'll play:
645 fixed lens: Fuji rangefinders
645 interchangeable lenses: Mamiya/Pentax/Bronica
6x6 rangefinder : Mamiya 6
6x6 TLR fixed lens: Rolleiflex, Minolta Autocord
6x6 TLR interchangeable lenses: Mamiya
6x6 SLR: Hasselblad, Bronica, Rolleiflex
6x6 “budget”: Yashica TLR, Kowa 6
6x7 fixed lens: Fuji 670
6x7 interchangeable lens rangefinder: Mamiya 7
6x7 SLR: Pentax 67, Mamiya RB/RZ67, Bronica
6x9 fixed lens: Fuji 690
6x9 “press”: Mamiya Press, baby Graflex
6x9 view camera: any view camera with a roll film back
... let the games begin!
Handy, handy list. Let me see if I can add some parameters to it.
Will try and make a table of it.