[MF3D.FORUM:1328] Larger aperture size for twin rig shots?

[Paul Talbot <ptww@xxxxxxxxx>]

There has been some discussion here in the past about
the possibility of a larger aperture size 80x132
mount for images from dual camera hypers.  Last night
I was mounting a test shot taken with two MF (stereo)
cameras on a bar.  I was amazed at how little room
there was (in the 50mm aperture size mounts) for
horizontal cropping of the hyper image, while keeping
the stereo window in front of the scene.

The non-overlap area of twin camera shots really uses
up a lot of the excess image area.  I haven't done any
calculations to nail down specifics, but perhaps someone
here could run a few numbers.  Assuming a 75mm FL lens,
what is the widest aperture size that can be used to
properly mount images assuming the image area on film
is a) 55mm wide; b) 60mm wide; c) 65mm wide and the
stereo base is a) 6 inches; b) 12 inches; c) 24 inches?

If no one is feeling ambitious enough to run all those
numbers, how about one or two combinations and the formula
to calculate the rest?  A spreadsheet would be nice.  ;-)

Paul Talbot