Re: Upside down and Pseudo...

[P3D Gregory J. Wageman <gjw@xxxxxxxxxx>]

Dan Shelley wrote:

>If you turn a single mounted pair
>and turn in upside down, or a stereo card and turn it upside down. You
>will get upside down pseudostereo.

No you won't.  Try it!  That was Bob's whole point.  As George's diagram
shows, rotating as a pair (e.g. Realist slide, Holmes card) never produces
pseudostereo, whereas rotating the individual images (or transposing them)
always does because it mucks with the homolgous point offsets.

(By the way, I though that was a really interesting question.  I really
had to think about what was happening in order to explain it.  On the
surface it does sound like a paradox.)

	-Greg W.


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