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PROJECTION DATA CHARTS
(Continued from page 10)
the square of the old throw by the square of the new throw.
Formula (Ax is the old throw; A„ is the new throw) :
V
B =
V
To determine the change of width of a picture with a change of throw, the lenses remaining the same:
Rule: To find picture-width change with a change of throw multiply the old picture width by the new throw. Divide the product by the old throw. The result will be the new picture width.
Formula (P1 is the old picture width; A2 is the new throw; A2 is the old throw) :
P„=
To determine the new throw required to change picture width to a desired width without changing lenses:
Rule: To find the new throw multiply the new desired picture width by the old throw. Divide the product by the old picture width..
Formula (Ax is the old throw; P2 is the desired picture width; Px is the old picture width) :
AiP2
A2 =
Met to Film Operas in Color
Completion of arrangements to film and exhibit operas throughout the world has been announced by the Metropolitan Opera Association of New York. The films will be produced in 35-mm color by International Opera Films, Inc., under the direction of Friedrich Feher.
Mr. Feher, originator and organizer of the project, is a pioneer in the industry, having started with Pathe in Germany in 1910.
Opera films will be shown first in art theatres, then reduced to 16-mm for exhibition in schools and clubs. Production is scheduled to begin this month with the filming of "II Trovatore" at Fox-Movietone's New York studios. The music will be recorded first, action then being synchronized with the sound track. The only scenes to be shot in the Opera House will be those of the orchestra in the pit. Casts will be selected from the Met's roster of world-reknown singers.
Edward Johnson, general manager of the Metropolitan, stated in connection with the project, "This is one more step in the direction of our ultimate goal: to bring more opera to more people in all parts of the world through tours, broadcasts, records, and now film."
looks could hurt!
• Bad sound brings on looks like these. They're aimed to hurt you plenty whenever bad sound ruins an otherwise top-notch show.
To make sure your sound has the snap and clearness that pleases every patron, sign up for RCA Service.
Through RCA Service your equipment gets regular checkups by a skilled factory-trained technician. He
is backed by the finest test equipment, test films and sound engineering in the business. You get fast service on parts. You get prompt help in an emergency.
Stop worrying that sound troubles may hit you where they really hurt. For the cost of a few admissions a day you can protect yourself against the sound trouble bugaboo.
RCA SERVICE COMPANY, IMC.
RA DiO CORPORA TIOM of A ME RICA
CAMDEN M.J.
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from the
West Coast Film Editors Local 776, I. A. T. S. E.
JOHN LEHNERS, Business Representative
/■
INTERNATIONAL PROJECTIONIST
December 1947
27