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P3D Re: Which Is The Best All-Around Stereo Viewer??

  • From: Gabriel Jacob <jacob@xxxxxxxxxxxxxx>
  • Subject: P3D Re: Which Is The Best All-Around Stereo Viewer??
  • Date: Mon, 27 Sep 1999 19:39:12 -0600
Tom Hubin writes,

>Regarding brightness. If the halogen bulb has a larger filament than the
>original bulb you may be losing light. I am not familiar with the
>viewer. However, a projector's condenser optics usually image the bulb
>filament at the projection lens entrance pupil. And just large enough to
>fill the pupil. 

The filament size has minimal impact on the light output in a viewer. The
reason being is that your trying to diffuse the light from the lamp unlike
in projection.

Gabriel