Re: [photo-3d] Digest Number 13

["Dan Shelley" <dshelley@xxxxxxxxxxxx>]

From: "Dan Shelley" <dshelley@xxxxxxxxxxxx>

><< As best as I can tell, there is no universal agreement as to why
> the curved mount was adopted. Some think the reasons you mention,
> while it may be that the thought was that a curved mount made the
> image look more "3D" >>
>
>Actually, I think there may be a very paractical reason, illustrated in a
old
>stereo view posted not long ago (I think by Dan Shelley) of a Keystone
>production line.  It showed stacks and stacks of view cards, all curled.
In
>my experience, with my flat cards, I can stack them only about 20 high
before
>they begin to slide, or at least become unstable.  Curved cards are as
stable
>as lego blocks, no matter how high they are stacked.  Could it be the curve
>is simply a matter of manufacturing expediency???

This is the picture Jim has made reference to: (at least I think it is...)

http://www.dddesign.com/3dbydan/apec/cards1.jpg

Here is another that also shows stack of views:


I have had it on my site to add to the APEC material there for quite some
time now... ;-)

Good theory Jim. I think it might be a combination of Thom's ideas and this
one as well.

Dan



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