ISO 2906:2002
(Main)Cinematography — Image area produced by camera aperture on 35 mm motion-picture film — Position and dimensions
Cinematography — Image area produced by camera aperture on 35 mm motion-picture film — Position and dimensions
This International Standard specifies the dimensions of the camera aperture images and the relative positions of the vertical and horizontal centrelines of the intended image area with respect to the reference edge and the perforations of the camera negative film for 35 mm motion-picture cameras. Motion-picture cameras used for different purposes require different aperture sizes. This International Standard specifies the image dimensions resulting from four styles of apertures used for the following purposes. Style A: Four perforations per frame nonanamorphic sound motion pictures. Style B: Four perforations per frame anamorphic sound motion pictures. Style C: Four perforations per frame instrumentation photography and full-frame motion pictures. Style D: Three perforations per frame motion pictures. This International Standard also specifies the position of the photographic emulsion and the frame rate for 35 mm motion-picture cameras.
Cinématographie — Surface d'image délimitée par la fenêtre de la caméra sur les films cinématographiques 35 mm — Position et dimensions
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 2906
Third edition
2002-02-15
Cinematography — Image area produced
by camera aperture on 35 mm motion-
picture film — Position and dimensions
Cinématographie — Surface d'image délimitée par la fenêtre de la caméra
sur les films cinématographiques 35 mm — Position et dimensions
Reference number
ISO 2906:2002(E)
©
ISO 2002
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ISO 2906:2002(E)
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ii © ISO 2002 – All rights reserved
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ISO 2906:2002(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted
by the technical committees are circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 2906 was prepared by Technical Committee ISO/TC 36, Cinematography.
This third edition cancels and replaces the second edition (ISO 2906:1984), which has been technically revised.
© ISO 2002 – All rights reserved iii
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INTERNATIONAL STANDARD ISO 2906:2002(E)
Cinematography — Image area produced by camera aperture on
35 mm motion-picture film — Position and dimensions
1 Scope
This International Standard specifies the dimensions of the camera aperture images and the relative positions of
the vertical and horizontal centrelines of the intended image area with respect to the reference edge and the
perforations of the camera negative film for 35 mm motion-picture cameras.
Motion-picture cameras used for different purposes require different aperture sizes. This International Standard
specifies the image dimensions resulting from four styles of apertures used for the following purposes.
Style A: Four perforations per frame nonanamorphic sound motion pictures.
Style B: Four perforations per frame anamorphic sound motion pictures.
Style C: Four perforations per frame instrumentation photography and full-frame motion pictures.
Style D: Three perforations per frame motion pictures.
This International Standard also specifies the position of the photographic emulsion and the frame rate for 35 mm
motion-picture cameras.
2 Dimensions
2.1 The dimensions shall be as shown in Figures 1 to 4 and Tables 1 to 4; they shall apply to measurements of
the image as formed on freshly manufactured, recently exposed and processed film.
2.2 The horizontal edge of the aperture shall be at substantially 90° to the edge of the film, with the vertical edge
pa
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