Projection w/out glasses

[harold baize <HAROLD@xxxxxxxxxxxxxxx>]

There seems to be some disagreement about whether to use the
polarized glasses when adjusting stereo slides on the screen.
I always thought that adjustments should be made without the
glasses because when you have them on your eyes are compensating
for misalignment, and as a result the adjustments you make will
depend on the ability of your visual system to cope with the
original misalignment. At recent showings at the Oakland Camera
Club I have found myself frequently lifting my glasses to see
that the images on the screen were many inches apart after they
were adjusted. Were they being projected correctly? I don't know.
Perhaps our many knowledgeable participants can clarify one thing
for me-- is it true that if the two frames fall on the same screen
space (no displacement) then the edge of the frame will be seen
at the plane of the screen and the stereo window will be the same
as when viewed in a hand held viewer? If so then projectionists
should lift their glasses ( and raise a toast) then align the
edges of the two images.

Back to work...
Harold.


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