TDC light measurements I

[P3D Dr. George A. Themelis <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

>PROJECTOR               Equal Throw Brightness        Equal Image
>SYSTEM                      as posted (EV)        Size Brightness (EV)
>-----------------------------------------------------------------------
>TDC 716/4"lenses/750Watt         5.6                    5.6
>TDC 116/5"lenses/500Watt         6.7                    6.06 (predicted)
>-----------------------------------------------------------------------
>
>Although this reduces the difference in brightness between the two systems,
>the more powerfull unit (electrically) is still duller.
>Steve Spicer >Australia

Well, I have hard time believing that the 750W bulbs will be dimmer than
the 500W bulbs in the same projector setup system!  So, I decided to pull 
out my lightmeter and do my own mesurements.  I pulled the 50x50 screen 
(now this screen feels like a toy after playing around with the 70x70 
Picture King Da-Lite Screen, only $170 + $30 postage from B&H, delived in 
3 days!)

I am focusing the lenses for a Realist image to fill the 50x50 screen
and I am getting ready to do the measurements.  These will be reported in
the next posting... -- George


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