Originally posted by RobA_Oz Forgive me asking, but does that mean the GFX lens mount is capable of supporting a full frame 645 sensor, in future? I would have thought that having a close registration distance might have hampered that development.
I must be so horrible that people started asking their forgiveness for asking questions!
I'm joking, of course, but such questions are appreciated - it shows that you care what I think about this matter. And that my post lacked clarity, or was incomplete.
To answer your question: I don't actually know about the GFX mount; it looks about the same diameter as Pentax 645 but the smaller registration distance might indeed hamper using larger sensors. I believe Winder is correct, it was made for the cropped medium format - and using a larger sensor is probably at least difficult.
However, I was thinking about lenses: the current GFX lenses being made for the "cropped" 645, they would have to start again with a "FF645" line. Not impossible, but I don't see it happening.
I expect Fujifilm to continue with the two "cropped" formats.