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160
The Joiirnal of the Association of CineTechnicians
Feb. -March,
193;
Scenes reciuiring effects called for by story use no general lighting, photography being done with modelling units.
TABLE I. Modelling Units.
36-inch Reflector Spot,
24-inch „ ,,
18-inch
Lens Spots, ...
Baby Spots, ... "Lupe" Lights,
150 amp. ARC. 10 kw. Mazda. 150 amp. ARC. 5 kw. Mazda. 2 kw. Mazda. 80 amp. ARC. 120 amp. ARC. 150 amp. ARC. 10 kw. lamp. 5 kw. lamp. 2 kw. lamp. 1000 watt. 500 watt. 1000 watt.
Modelling lighting serves to create highlights and contrasts and give higher key to "star" and limited groups of actors. This illumination is two to four times as high as general lighting, and in special cases as high as eight times as great as soft as general lighting.
Model or hard lighting beams 12 to 20 degrees. Illusion of depth obtained by "back-lighting." General rule is to mount lamps on parallels.
TABLE II. Lighting Equipment for Motion Picture Photography
(Hlack-and-\\hitc-).
Small
Room,
20 X 20 ft.
Medium
Size,
50 X 50 ft.
Large Size,
Larger
than
50 ft.
Type of Set.
Close-Up Min. Max.
Min. Max.
Min. Max.
Min. Max.
General Lighting
Broadsides
2
2
4 8
10 20
20 40
Overhead (Scoops)
2 3
5 10
12 30
Overhead Strips or Domes
1
1
2 3
2 4
8 12
Modelling Lighting
24 or 36 inch
Reflector. 18-in. Reflector
1
2
1 2 4 6
2 8 6 12
4 16
10 20
Lens Spots (Large)
Lens Spots (Medium)
Lens Spots (Small)
1 1
1
2
1
1
2 6 2 4
2 8
4 8 2 4
4 16
12 24
2 8
For "Technicolor" process, general illumination is 750 foot-candles, high-light level 1,000 to 1,200 foot-candles.
White flame arcs used for general lighting, modelling is given by high-intensity arcs using amber filters to level blue-violet radiation, incandescent lamps use blue filters.
Frisnel lens spot is new 2,000 watt lamp (also available in 5,000 watt high-intensity arc) — much used for colour work.
Special incandescent lamps for Technicolor photography designated C.P.
Front lighting problem overcome by mounting highpower lamps on bridge through which camera can shoot.
(From S.M.P.E. Journal, fanuavy, 1937).
New Anti-Flutter Device
Equipment for the accurate measurement of film flutter, the distortion caused .by variations of film speed and density, is announced by Western Electric. This is regarded as a further step in the improvement of sound motion picture quality. The new equipment was recently demonstrated in New York by V. Subrizi, of the special sound motion picture research staff of the Bell Telephone Laboratories, and is particularly interesting to the service organisation.
The new apparatus is a further development of the "flutter bridge" which Western Electric announced last year. It makes use of the "filter" principle to separate the sound frecpiencies, and permanent records of the measured data are recorded on a moving paper tape.
Mr. Subrizi's talk was accompanied by a series of slides illustrating the more technical aspect of his subject and closed with a practical demonstration of various flutter recordings made for the purpose of instructing serxice men in the art of detecting and indentifying \arious types and degrees of flutter as experienced in the theatre.
The Journal of the Association of Cine-Technicians
PUBLISHED Six Issues per annum ( 1 st February, April, June, August, October. December).
Editoral Committee:
Sidney Cole, George H. Elvm, Kenneth Gordon
Subscription Rate.
9d per copy ; lid post free. 5 6 per annum,
post free.
Special A.C.T. Members' Rates.
(including A.C.T. Technical Abstracts monthly).
6d per copy ; 8d post free, post free.
4/ per annum,
Order tiu-ough any A.C.T. Studio, Laboratory or Newsreel representative, any branch of W. H. Smith & Son, Ltd., or direct from
The Association of Cine-Technicians, 30 Piccadilly Mansions,
17 Shaftesbury Avenue,
London, W'.l.