Quote Originally Posted by ntenny View Post
It does? That'd be a nice surprise---the material I found online suggested that the first generation were vertical and they switched to horizontal around the time of the Pro. Detailed information seems kind of thin on the ground for these cameras, though.

None of the Mamiya 645 cameras - from the initial 645 in 1975 to the last AFDIII - shoot in a native vertical orientation.

Are you sure that you aren't confusing this with the Bronica RF?