P3D Film Recorders

[bob Wier <wier@xxxxxxxxxxxxxxxxx>]

>Has anybody tried scanning stereo slides and then duplicating them by
>photographing the computer screen?  Once the proper distances have been
>determined, this might be an easy way to create duplicates.
>
>HTH,
>Ron
>
I've done some of this - although mostly to get hard copy of
computer generated images. Depending on your eventual use,
it might or might not work satisfactorily. If you are planning
on slide projecting, probably it won't work very well, as you'll
get 'pixellated' images - ie, squares of color at relatively
low resolution (most computer screens will handle something in
the range of .26 to .30 inches per dot - so you can take the
width of your monitor and figure what kind of resolution you'll
be getting if you have a full width image).

There are also problems about getting partial screens lit up
and so forth. Still - if it's your only option, it might be
worth a try. Color correction is also another thing to worry
about. 

Film recorders basically to the same thing, but they are
expensive (!) - some actually use a monochrome CRT (much
finer resolution possible than with color) and expose each
image for Red, Green, and Blue (or Cyan, Magenta, and Yellow,
depending on the system). It does this by rotating a color
filter in front of the lens of the taking camera. Some very
expensive systems delete the optics completely and project
(write) directly onto the film itself. 

Unfortunately you almost never see even the cheap versions
(perhaps $5,000) on the used market. If anyone does, I'd
*really* like to get one for the college here - I've gotten
good results from using one on loan for a short period,
followed by traditional darkroom work.

THANKS

--Bob Wier

       mailto:wier@xxxxxxxxxxxxxxxxx 
       1:31 PM Wednesday, August 4, 1999
     Unix/Internet Systems Administrator
    Rocky Mountain College, Billings, MT
      (currently in Ouray, Colorado)



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