T3D Re: center of perspective

[Greg Erker <erker@xxxxxxxxxxxxxx>]

>The center of perspective for the scene is that pinhole.  It's
>where the eye of the camera is located in three-space.  To view
>the image properly, you have to place your eye where the pinhole
>was.  That's pretty close so we generally use a magnifier to get
>that close or we enlarge the image ten times so we can put our eye
>ten times as far away and thereby still conserve the center of
>perspective.  As you can imagine, if your image is ten times as
>big and your eye is ten times as far away, the sight lines to the
>image points still have the correct angles between them.

Just to clarify (if it wasn't already) John is
talking about viewing the slide by placing your
eye the same distance away as the pinhole was
originally.

Alternately you can make an enlargement (usually a
print) and view from 10x the pinhole distance in
this example.

Greg E.


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