[MF3D.FORUM:983] Twin Gepe MF stereo

[Paul Talbot <ptww@xxxxxxxxx>]

I mentioned that Jacob van Ekeren has built a demo
of a new MF 3D stereo viewer that accomodates twin
Gepe-mounted MF slides.  The reason for that design,
of course, is to allow the images to also be projected
in twin MF projectors.  Those interested in using
twin Gepes while utilizing existing conventional
viewer designs might be interested in an idea Dwight
Cummings came up with and described to me at the
convention.  Dwight has experimented with modifying
Gepe mounts by trimming a bit off the front half of
the left image and also off the back half of the
right image.  The two Gepes can then be placed close
enough to each other to be used in conventional
viewers, and can also still be used in MF projectors.

Here's an attempt at an ASCII diagram showing what
this would look like (exaggerated demonstration):

Back side:
   ________________________
  |   ......   || ......   |
  |   .    .   || .    .   |
  |   .    .   || .    .   |
  |   ......   || ......   |
  -------------------------
                       
Front side:            
   ________________________
  |   ...... ||   ......   |
  |   .    . ||   .    .   |
  |   .    . ||   .    .   |
  |   ...... ||   ......   |
  --------------------------

The dotted area shows where the MF slide chips would be.
There are of course only two chips, I just drew each of
them twice to show how the mount halves align.

Can anyone make sense of the above, or have I butchered
this expnation far too much to be of use?  ;-)

In the basic form, Dwight's modified Gepes would simply
overlap.  In an advanced form, the cuts that narrow two
of the four plastic pieces would be made in the shape of
a V, creating interlocking grooves for greater stability
while viewing in a hand viewer.

Paul Talbot