Re: Big Screen Projection

[P3D Don Radovich <donrad@xxxxxxxxxxx>]

Hi all,

Does anyone know the relationship between the size of projected images and
the distance of the projector to the screen?  In other words, (assuming a
TDC with 5" lenses) how far back does the projector have to be to fill a 40
x 40" screen; a 70 x 70" screen; a 10' x 10' screen?  What about with 4" lenses?

I seem to remember something similar being discussed already and I did a
quick search of the photo-3d archives, but I must be using the wrong words :-)

Also (just wondering aloud), why would Dr. T sell the TDC with 4" lenses and
keep the one with 5" lenses?  I always thought the 4" were much more
desirable.  Are there disadvantages to the 4"?

Don
-----
George Themelis writes:

>Thanks to good friend and local stereo photography enthusiast, Jim Motley, I
>got a "70 in." projection screen...
>My projector is a TDC 116 with 5 in. lenses.  Works well...
>If anyone is interested, I will have a very nice TDC 116 with 4" lenses and
>case, all in excellent condition, cleaned and lubricated, for sale in the
>NSA regional meeting on May 26th.  As always, priced very reasonably...
>


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