Re: [photo-3d] Unusual stereoview card format

["Dan Shelley" <dshelley@xxxxxxxxxxxx>]

Ralph,

This is one of MANY of this type of card. There are whole sets that were 
designed to help people excersize their eyes. The telebinocular viewer was 
commonly used for such work, both in office versions and take home versions. 
In fact, the Keystone company that still survives is making and distributing 
these things even now.

For what it's worth, I had no problem freeviewing the images on my screen, 
and can do so on other similar cards at home. However, I find that using my 
large telebinocular makes viewing them easiest. I suspect any stereo viewer 
would work OK however.

Dan

>From: Ralph Johnston/Linda Sherman <copley@xxxxxxxxxxxxxxx>
>
>I just uploaded a scan of an SV card with two pairs of photos of cats
>(which I collect and just bought on e-Bay).  But this one has small real
>photos with two different spacings, 73mm and 69mm and is billed as "AN 28
>(35450) Keystone Eye-Skill Training Series".

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