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P3D Re: Keystone distortion when projecting

  • From: "Greg Wageman" <gjw@xxxxxxxxxx>
  • Subject: P3D Re: Keystone distortion when projecting
  • Date: Thu, 11 Mar 1999 13:00:42 -0800

From: Ralph Johnston/Linda Sherman <copley@xxxxxxxxxxxxxxx>


>With short focal length projector lenses, one would tend to move the
projector
>closer to the screen and get keystone distortion.  (The left image is
keystoned
>differently than the right one).  This would be worse when using twin
>Ektagraphics because the distance between the lenses would be greater.


Not if you stack them, for example using the inexpensive twin-projector
stand made by Da-Lite and sold by Reel-3D, B&H, etc.

     -Greg W. (gjw@xxxxxxxxxx)



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