Quote Originally Posted by MenacingTourist
I've been shooting with a 90mm ... what about the 180mm?
Mamiya is the only manufacturer I know of to offer a
1.414 lens series; 65, 90, 127, 180, 250, 360. Each
increase in those focal lengths reduces by one half
the area of coverage, no more, no less.

I'd recommend the 180. I used a 180 on 6x6 and
found myself too distant. It should work well with
6x7. Better depth of field control with the
longer focal length. Dan