6x7 has an aspect ratio of 1:1.25 (4:5).
Originally Posted by John Koehrer
As others have said, halve the MF FL to get rough approximation of the same angle of view of 35mm. The scene will determine the focal length you need. Personally, I generally carry three lenses when hiking with my GS-1; 50mm, 110mm macro and 200mm. I also have the 250mm, but it is substantially longer and heavier than the 200mm for some reason.
Originally Posted by peter k.