Super 8 Sound Inc. - Desktop Video Group

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 ........................................... 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 ozonefree
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 ........................... 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 adequately
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.
46 95
Super 8 Sound , Inc.
Harvey Street. Cambridge. Mass. 02140
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 trimmers.
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 directions;
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 concentrates
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 distance
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 incident.
You can use your light meter to measure screen and projector
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") ........................................................... DALITE50
Da-Lite Classic (60"x 60") ........................................................... DALITE60
Da-Lite Classic (70" x 70") ........................................................... DALITE70
Da-Lite Model B (63"x 84") ...................................................... DALITEB7
Da-Lite Model B (72" x 96") ...................................................... DALITEB8
Da-Lite Model C (72"x 96") ...................................................... DAL ITEC8
Da-Lite Model C (108"x 144") ................................................ DALITEC12
Kodak Ektalite Screen (40" x 40") ................................................ EKTASC
Kodak Ektalite Screen Sample (9" x 12") ................................ EKTASS
(excellent for table top screening)