This standard specifies the position and size of the image formed on the film by the camera window when shooting 35mm non-anamorphic images and anamorphic images. This standard also recommends the positioning holes of the film in the camera. GB/T 4635-2000 Position and size of the image formed on the film by the camera window of 35mm motion picture camera GB/T4635-2000 Standard download decompression password: www.bzxz.net
This standard specifies the position and size of the image formed on the film by the camera window when shooting 35mm non-anamorphic images and anamorphic images. This standard also recommends the positioning holes of the film in the camera.

ICS 37.060
National Standard of the People's Republic of China
GB/T 46352000
eqy IS0 2906:1984
Image area produced by camera aperture on 35 mm motion-picture film-Position and dimensions2000- 10 - 17 Issued
Implementation on 2001-03-01 Issued by the State Administration of Quality and Technical Supervision
GB/T4635\u20142000
This standard is based on ISO 2906:1984
Image area produced by camera aperture on 35 mm motion-picture film-Position and dimensionsGB/T 4635-1984 35 mm The position and size of the image formed by the film of a movie camera on the film. This standard is equivalent to IS02906:1984 in terms of technical content and writing rules. GB/T4635-1981 was formulated in the early 1980s with reference to the international standard ISO2906:1972 "Movie - Picture formed by 35mm film + camera window". [SO/TC 36 revised ISO 2906;1972 in 1984. In this revision, the basic technical parameters have not changed, and the main thing is to add the description and graphic annotation of the technical parameters of the relevant items. In the revision of this national standard, the name of the standard was first changed to "The position and size of the picture formed by the film window of a 35mm movie camera on the film" equivalent to ISO2906, 1984. This standard was proposed by the State Administration of Radio, Film and Television. This standard is under the jurisdiction of the China Film Science and Technology Research Institute. This standard is drafted by the China Film Science and Technology Research Institute. The drafter of this standard is Sun Yanwei.
This standard was first published in 1984, and this revision is the first revision. This standard is entrusted to the China Film Science and Technology Research Institute for interpretation. GR/T 4635\u20142000
ISO Foreword
ISO (International Organization for Standardization) is a worldwide federation of national standards associations (ISO member groups) of various countries. The formulation of various international standards is completed through IS () technical committees. All member groups interested in the topics authorized by the technical committee have the right to select representatives to participate in the technical committee. Official and non-official international organizations associated with ISO (International Organization for Standardization) can also participate in this work
All draft international standards adopted by the technical committee should be distributed to all member groups for comments before being approved as international standards by the ISO committee.
International standard ISO2906 was formulated by IS0/TC36 Film Technical Committee and distributed to all member groups in February 1983.
The member organizations that voted in favor of this standard are the following countries: Australia
Belgium
Brazil
Canada
Czechoslovakia
France
No member organizations voted against it.
Federal Republic of Germany,
Italy
Open Edition
North Korea
Mexico
Poland
Switzerland
UK
USA
Soviet Union.
This standard is the second edition of the standard and cancels and replaces the first edition of the standard (i.e. ISO2906:1972). *Former West Germany
**Former Soviet Union
Scope
National Standard of the People's Republic of China
Image area produced by camera aperture on 35 inrmotion-picture rilm-Positian and dimensionsGB/T4635\u20142000
eqyiso2906:1984
Generation GB/T4635--1984
This standard specifies the position and dimensions of the image produced by the camera aperture on the film when shooting 35mm non-anamorphic images and anamorphic films (with a lateral compression ratio of 2 and a screen aspect ratio of 2.35). This standard also recommends the positioning perforations of the film in the camera. 2 Referenced Standards
The texts contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision. Parties using this standard should investigate the possibility of using the latest versions of the following standards. ISO 23:1993 Cinema
35 mm motion picture film for use in cameras - Technical requirements ISD 491:1998 Cinema - Cutting and perforation dimensions for 35 mm motion picture film and magnetic reels IS 2907:1984 IS 0 2939:1986 IS 4238:1976 3 Dimensions
Cinema - Maximum projectable picture on 35 mm film Cinema -
Position and dimensions
Position and dimensions of the picture and optical soundtrack on 35 mm film release prints Cinema - Optical print ratios for enlargement or reduction of the film frame Technical requirements 3.1 The dimensions are shown in Table 1 and Figure 1. These values \u200b\u200bapply to films that have been exposed and processed immediately. Table
Deformed surface)
A and non-deformed H surface)
(1.37 : 1)
Maximum (deformed and non-deformed surfaces included) K and I
E and
1) A The minimum allowable distance is 7.65 mm.
2) B is a derived reference value. It must be limited to a range that does not affect optical recording. S) KL.
4) The difference between E and F of deformed and non-deformed sheets should not be less than 0.20 mm. Approved by the State Administration of Quality and Technical Supervision on October 17, 20007.80
21.95
1.75
29.75
18. 60+0 *g
16.00+0.5g
Implemented on March 1, 2001
Accidental to the optical axis of the object and
Center of the intended shooting surface
Contraction
GB/T 4635-2000
Figure 1: Picture formed by the film window of a camera
(Figure 1 shows the result of viewing the camera from the inside of the camera) Note
In some cameras
these films may also be used to determine the direction of film travel
the reference edge
the camera's guide pins
should engage with these film holes
1 The reference edge in Figure is the reference line for the dimensions specified. When the film edge is used as a guide, it is recommended that the reference edge be used as a guide. 2 The dimensions specified are for unshrinkable film. 3 The purpose of this standard is to ensure that the image displayed by the camera is always larger than the largest image that can be projected on the print. Adherence to the dimensions specified in this standard will not result in repeated illumination between frames.
4The picture height of the film played on television is slightly higher than the copy picture shown in the cinema, so the photographer should be careful to ensure that irrelevant and unwanted objects are not photographed in the picture. 3.2 The horizontal edge of the film window should be perpendicular to the edge of the film, and the vertical edge should be parallel to the edge of the film.
National Standard
35mm movie camera window on the picture formed by
Film position and size G/T 4635--2000
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