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[MF3D.FORUM:1649] Viewing 6x7 Gepe mounts

  • From: "a c" <narjan@xxxxxxxxxxxx>
  • Subject: [MF3D.FORUM:1649] Viewing 6x7 Gepe mounts
  • Date: Tue, 10 Apr 2001 20:12:27 -0400
Hi folks,
 I'm going to have to "Beg to differ" with Mr. Paul Talbot on his
comment that viewing 6X7 side by side is out of the question,
Many happy stereophiles happily view a format that is wider than their
eye spacing, that format is the stereocard, viewed in a holmes viewer, a
quick measurement of some cards shows typical image spacings of 75 to 80
mm. the Gepe 6X7 mounts are 85 mm wide. I have a home -made viewer with
50mm dia by 150 mm fl achromats with adjustable inter occular.  I can
view two of the aforementioned gepe mounts if the lenses are spaced  at
95mm center to center. My eyes are of average spacing. now the arguments
regarding prismatic distortion and "keystoning" may ensue...
Regards,
John Billingham