User`s manual
Super8 Sound Sync Projectors
S8S# ELMOSC8T
Elmo SC-8T Rear-Screen Projector
Although this is not a continuous-loop projector, it has many
of the same applications. The Elmo SC-8T is basically the
same mechanical and electrical components as the Elmo
ST1200, but squeezed into a portable case with a large rear
screen. It accepts film on reels (400 ft.), and can project
them both rear screen and front screen.
Elmo SC-8T Rear Screen Projector
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ELMOSC8T
Xenon Arc Projectors
A Xenon-arc conversion of the Heurtier ST42 is being offered
by Valley Projection of Burbank, CA. The lamp is an ozone-
free 500-watt Osram Xenon. 1500-hour lamp life. Another
firm doing Xenon arc conversions of Super 8 projectors is the
Optical Radiation Corporation. See the Publications section
of the Super8 Sound Catalog for a list of Super 8 industry
addresses.
Valley Projection Xenon Heurtier ST42 Mono
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VPXST42
Valley Projection Xenon Heurtier ST42 Stereo . . . . VPXST42S
Metal-Arc Projectors
We expect General Electric or Sylvania will soon offer a
version of the Marc (GE) or Colorarc (Sylvania) metal-arc
lamps and power supplies suitable for replacing the standard
Super 8 quartz-halogen lamp. Most Super 8 projectors now
use the common EFP lamp, and the blower system can ade-
quately cool the lowest-power metal-arc projector lamps.
This is especially true of the Elmo ST1200, which already
uses the 150W EFR bulb. Elmo has introduced a metal-arc
projector in Japan, and we hope it will be available soon in
the U.S.
Leader Trimmer
The best way to avoid misthreading an automatic-loading
projector is to keep the leader free of wrinkles and with a
sharply-cut leading edge. Most projectors have built-in trim-
mers. If not, use a fingernail clipper or buy this elegant Kodak
Leader Trimmer.
Kodak Leader Trimmer
TRIMMER
Projection Screens
You should choose a screen surface based on the shape of the
audience seating pattern and the ambient light conditions.
Matte — reflects less than one-quarter of the incident light
straight back, and distributes the rest evenly to sides of room,
ceiling, and floor. Equally bright from any angle, but dimmest
of all screens.
Lenticular — concentrates light in the vertical direction; about
one-third the light appears to come straight back and the rest
is distributed widely so that seats to sides have a bright image.
Best for wide, shallow rooms.
Beaded — concentrates light in vertical and horizontal direc-
tions; beams about one-half the incident light straight back
into a relatively narrow cone. Best view for a long narrow
audience in line with the projector.
Ektalite — Kodak's special aluminum curved surface concen-
trates light even more strongly than a beaded screen. It is so
bright and so mirror-like that it can be used in rooms with
open windows and overhead lights. Of course it can be viewed
only from limited angles.
You should choose a screen size based on your room size,
seat distribution, and projector brightness. The old rule of
thumb is that the screen width should be one-third the dis-
tance to the rear seats. Today theaters often use screens that
are even wider. The typical Super 8 projector zoom lens
(15-25mm) will fill a screen of width four to eight feet at 20
feet. The typical Super 8 projector lamp produces a screen
brightness of only a few foot-lamberts for a 3' by 4' image on
a matte screen. A foot-lambert is the surface brightness of a
diffuse matte white surface on which one footcandle is inci-
dent. You can use your light meter to measure screen and pro-
jector performance. The SMPTE screening room brightness
recommendation is sixteen footlamberts. You can improve
things by a) darkening the room, b) using a higher gain screen,
or c) getting a metal-arc or Xenon-arc lamphouse for your
projector.
Super8 Sound carries Da-Lite beaded surface roll-up screens
and Kodak Ektalite screens. The most popular sizes are listed
below. These screens are easily suspended from eye-hooks in
the ceiling.
Da-Lite Classic (50"x 50")
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DALITE50
Da-Lite Classic (60"x 60")
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DALITE60
Da-Lite Classic (70" x 70")
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DALITE70
Da-Lite Model B (63"x 84")
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DALITEB7
Da-Lite Model B (72" x 96")
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DALITEB8
Da-Lite Model C (72"x 96")
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DAL ITEC8
Da-Lite Model C (108"x 144")
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DALITEC12
Kodak Ektalite Screen (40" x 40")
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EKTASC
Kodak Ektalite Screen Sample (9" x 12")
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EKTASS
(excellent for table top screening)
Super 8 Sound
,
Inc.
46
95 Harvey Street. Cambridge. Mass. 02140