Mounting jig - Reply - PS

[P3D Dr. George A. Themelis <fj834@xxxxxxxxxxxxxxxxxxxxx>]

I forgot to mention that I mount my slides by placing the nearest object
close to the stereo window (or through it if possible!)  In other words I
look at the closest object only, and let the furthest object fall where
ever it may.  I can very easily do that by just looking at the slide
through the viewer.  I do not need to measure anything but must be careful
to keep the maximum deviation under control.

There is another school of thought in stereo that mounts to "constant
infinity separation".  According to this school, the furthest object in a
slide should have a constant separation.  So these people mount slides by
placing the furthest object at a constant spacing and letting the nearest
object fall where ever it may.  These people might need a mounting gauge to
help them position infinity at this constant separation.

Using cardboard heat seal and slip in mounts there is little freedom in
changing the spacing of the chips (since these are held rather tight in
place) so this is not an issue.  The stereo window in a slide properly
cut and centered in these mounts is set at about 7ft and the infinity
separation is constant.  So a mounting gauge is not really needed (again,
provided that a regular stereo camera is used).

The mounting gauge is more important when using mounts like the RBT or
Albions that allow control of the horizontal spacing (RBT gives a little
spacer that will space the slides at a constant distance) or when mounting
wide slides in narrow mounts, etc.

George Themelis


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