Re: over-under

[P3D John W Roberts <roberts@xxxxxxxxxxxxxxxxx>]

>Date: Sun, 20 Jul 1997 14:01:23 -0500
>From: P3D Allan Woods  <allanwx@xxxxxxxxxx>
>Subject: over-under

>...I constructed a carefully made bracket to hold two cameras.  I
>measured carefully to ensure the lenses were properly aligned,
>one directly above the other.  The cameras also were triggered
>in synch.

>When I got the pictures back and arranged them for viewing, I
>could not produce for myself the 3-D effect I had sought.

>Can some of the old-time listmembers help me here?

>Should I be using red-blue glasses when I take the pictures?
>Should I shift my weight while viewing?
>Do I have the top picture on the bottom?

I recommend you carefully examine the prints. Sometimes they get flipped over
so that the back of the print is facing you, and the image side is facing
away - that can seriously impede the 3D effect.

Another problem arises when people try to use an over-under viewer in a
vertical position, looking straight down. In this position, when one print
is placed directly "over" the other, it completely obscures the one
underneath, so you only get a 2D view. For viewing at this angle, you should
place each image on top of the other one, so you can see both of them at the
same time.

:-)
John R


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