Stereo 3D pictures
David Allen, of the Cascade Stereoscopic Club of Portland, took
some stereo photographs of the 700 at St. Marys yard and has
shared them with the PRPA. David's advice for viewing is as follows:
"To help view cross-eyed stereo 3D pictures, hold your thumb in
front of you, about half way to the monitor. While focusing on
your thumb, slowly shift your gaze to the the 3D pictures
and transfer your attention to the 3D pictures. You should end up
seeing 3 pictures and the one in the middle will be in 3D"
What worked for me was simply to cross my eyes until the middle image
fused or "locked". After you've achieved it once, it becomes easier
to regain the view. Incidentally, a person taking these kind of
pictures is called a stereographer.