P3D Print and slide exhibitions...

["Dr. George A. Themelis" <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

A reply to Jim Norman's comments:

>it seems to me that an organization dedicated to handling
>slides could easily adopt to the comparatively low-tech use of cards.  But a
>group dealing with cards only would have to make a major investiment to handle
>slides properly.  I think George's suggestion would lead to the disappearance
>of a few print competitions.  

Interesting thoughts but I am not quite sure that slides are any "higher 
tech" or more expensive to deal with than cards.  To conduct a stereo slide 
competition you need the following:

1. TDC 116 projector (about $300 used)
2. Silver lenticular screen (about $150 new for 70 inch wide)
3. A dozen or so polarizing glasses ($10?)

To conduct a stereo card competition, IMO you need good viewers with 
achromatic lenses.  The Keystone one is a good choice and Bill Walton has 
been promoting these.  This viewer used can cost $250, IF you can find one.  
It would be nice to have 3 of them.  I have seen many more TDC 116 
projectors than Keystone achromatic viewers.

Of course, people can donate the equipment, space and time.  This is what 
is usually done so it costs almost nothing to conduct these judgings.  I 
really don't see why slides are high tech while cards are low tech and I 
definitely do not see any major investment associated with slides.
    
>In my view, one of the attractive aspects of stereo cards is that the entry
>barrier is so low.  You can get started in 3-D with the simplest of single-
>lens cameras (a cardboard single-user will do) and a $4 lorgnette.  And if you
>can see those "Magic Eye" things, you don't even need the lorgnette.  You just
>can't say the same for slides.

You are basically correct... I started with prints too, because print 
film is what I knew and because I had access to a mirror stereoscope.  
However, I soon realized that working with slides is not a big deal.  In 
some respects it is easier than prints.  You just use slide film and buy 
the $3.25 viewer from the same place you buy the $4 lorgenette.  Get slip 
in mounts and slide the chips in.  If you have a stereo camera then you 
send your slide film to Kodak and you get back mounted pairs.  Do you know 
of any place that will return your stereo prints mounted?

George Themelis


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End of PHOTO-3D Digest 3191
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