From: Ruben Guzman (email suppressed)
Date: Fri Jan 02 2004 - 08:21:26 PST
Here're some tips for home-made telecine. I hope it
helps.
SHUTTER SPEED. That will depend on the projector
you're using. As a general rule, I've successfully
used 1/60 and even 1/75, when it comes to interlaced
video. With some super-8 projectors, I was forced to
use their variable spped.
PARALLAX. It's the angle between the camera and the
projector. Ideally, it should be kept to a minimum in
order to avoid distortions. For this reason, I would
suggest you do not place the camera close to the
"screen". Also, placing the camera too close would
make your focus more critical. Unorthodox use of
parallax could be used to achieve a "deformed" 16:9
ratio, by simply increasing the parallax angle.
SCREEN. Even a regular 81/2 x 11 paper will do, but
you may want to consider using a mirror at 45 degrees
and projecting THROUGH a frosted glass (preferably
chemically processed to achieve a smooth, discreet
texture) or good quality tracing paper. Thus, you can
build your own "rear projector" using, say, an old
shoe-box. It works, plus you can also enlarge portions
of the frame by adjusting the distance between the
projector and the mirror!!!
COLO(U)R BALANCE. You should adjust it manually for
better results.
EXPOSURE. Do not get too far away from the screen, for
you'll lose too much light, but do not get too close
either (unless you're using the 45-degree mirror), to
avoid the parallax problem.
FOCUS. Follow the usual procedure: zoom in al the way,
focus, and pull out to the desired frame. Do not use
thick cardboard or 3-D objects, for focusing is
critical.
RATIOS. You'll have to adjust the video ratio to that
of film.
good luck,
r.
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