P3D Realist Realarama viewer

[Peter Homer <P.J.Homer@xxxxxxxxxxxxx>]

Mark Shields wrote

>It's probably too late to get the Realist Realarama viewer that
>was advertised on S3D, but I was just wondering how one
>works, and how good are the lenses? I'm supposing it has
>to use mirrors somehow so that both eyes look at the same
>slide.

Viewmaster also produced something like this I dont think it would be like
your Pentax beamsplitter viewer, viewing two half frame stereo pairs side
by side to produce a true stereo image, if that is what your after. They
just used mirrors or prisms something like a binocular microscope to
produce two images from one with perhaps a slight shift to produce a stereo
window,but there is no stereo apart from that. Maybe you could modify one
of these to give a Pentax type viewer. Perhaps it is simulated stereo you
are interested in because you also wrote.

> My school has an Agfascop viewer that has one
>big plastic lens to view a slide from a distance of about
>8 inches away from the viewer. It seems to impart a feeling of
>stereo to flat slides.

I have one of these type of viewers and it does seem to impart some stereo
to flat slides,I think what happens here is first the lens is large enough
for both eyes,and chromatic aberations in the lens produce a
chromostereoscopic effect.
The different degrees of refraction of the different colours produces the
seperation but it does not always work the right way round. Red will come
to the foreground even if its in the background so the effect is often
pseudoscopic rather than stereoscopic.  P.J.Homer