Re: PSSP Meeting summary - comment on projection

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

In Adam's report we read:

>1.  The TDC takes a team of four people to get somewhat smooth and quick 
>operation and presentation (one to feed the slides, one to focus, and one on 
>each of the horizontal and vertical adjustments).  I'm sure one could get by 
>with fewer people, but this seemed the most effective way to minimize 
>headaches and eyestrain.

Actually, I belong to a group of people who think that adjusting the
projector for every singly slide is a good way to *maximize* headaches 
and eyestrain...  

If the slide is just a little bit misadjusted, I believe that trying to 
adjust it will cause more harm than good.  

Assuming that the projector feeds the slides square (and the TDC does
this) and that people take a reasonable care when mounting slides (most
people do) then there is no need for vertical adjustment, only 
focusing (due to the varying thickness of the mounts used).  The
TDC projectionist can easily adjust focusing... but a helper with good
eye sight, sitting closer to the screen and using a long cable, can be 
of some help.

Also, I oppose to horizontal spacing adjustment during projection to
minimize ghosting... This offers nothing and it is an excellent way to 
induce headache and reduce the impact of the projected image...

The "no adjustments (except for focusing) during projection" policy is 
followed in the Detroit club with excellent results.

George Themelis, a happy one-man projectionist



------------------------------