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Ref. No. : lSO/R 23 - I956 (E)
IS0
I NT ERN AT1 ON A L
O RG A N IZAT I O N FOR STA N DA RD IZATl O N
IS0 RECOMMENDATION
R 23
EMULSION AND SOUND RECORD POSITIONS
IN CAMERA
FOR 35 mm SOUND MOTION PICTURE FILM
Is* EDITION
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Copies to be obtained through the national standards organizations.
Also issued in French and Russian.
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lSO/R23 - 1956 @,
IS0 Recommendation R 23 November 1956
EMULSION AND SOUND RECORD POSITIONS
IN CAMERA
FOR 35 mm SOUND MOTION PICTURE FILM
-
Light beam
O
c)
O
O
O
O
Travel
O
(3
1
O 31111 1:
Sound record area
The emulsion position in the camera is toward the lens, except for special
processes.
BRIEF HISTORY
When it was submitted to all the IS0 Member Bo-
The IS0 Recommendation R 23, Emulsion and
dies in January 1955, the Draft Recommendation was
sound record positions in camera for 35 mm sound
approved (subject to some improvements in
...