Mounting methods

[bob.aldridge@xxxxxx (Bob Aldridge)]

Dr T wrote:

->I mount to the window because this looks better to my eyes.  And I
->know that I am not alone.  Paul Wing and David Starkman have taken
->the same position in articles in Stereoscopy.  On the other hand, a
->past editor of Stereoscopy (I forget his last name, Don was the
->first, he passed away while he was still the editor, around 1988, I
->think, in UK) has been a strong advocate of the infinity mounting in
->long and detailed articles in Stereoscopy.  John B., I can mail you
->copies if interested. 

George, I believe you are referring to Don Jeater, one of the founders
of the ISU. The current most vociferous advocate of mounting-to-infinity
is Mike Fisher who put together the Portrait of Britain show that many
will have seen at ISU Congresses in Eastbourne and Atlanta. 

I think Mike has a very valid point when it comes to the third
circumstance of viewing stereo slides (the first two are viewers and
projection...). This is stereo projection in an AV show. I.e. many
slides are assembled together with a sound track and projected using
dissolve techniques. 

Whilst I normally mount to-the-window, (mainly to reduce ghosting from
inefficient polarising systems...), in a perfect world I, too, would
mount to infinity for AV, so that the viewer's eyes aren't constantly
changing convergence - even if they are looking to infinity during the
dissolve. This method gives a much smoother viewing experience for the
audience - which they won't be able to define, but it's there.

So I think there is a very definite application for both systems. The
only real issue is whether the slide is "mounted" in the first place! 
Most of the output from the trade mounting services are merely holding
the chips together - NOT mountng... Incidentally, over here in Europe at
least, Kodak's service is achieved BY HAND! They don't use a machine,
and the mounting criterion seems to involve covering the aperture with
the chip. Anyhow.

That's my two-pennorth, anyway.

Bob Aldridge
Stereoscopic Society Projectionist
London, England
---
 * POW 1.3b 0007 * fhi i YoUG modEM Tn dGUgs


------------------------------