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1、BRITISH STANDARD BS ISO 2906:2002 Cinematography Image area produced by camera aperture on 35 mm motion-picture film Position and dimensions ICS 37.060.99 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00
2、2006, Uncontrolled Copy, (c) BSI BS ISO 2906:2002 This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 8 April 2002 BSI 8 April 2
3、002 ISBN 0 580 39304 6 National foreword This British Standard reproduces verbatim ISO 2906:2002 and implements it as the UK national standard. It supersedes BS 5550-3.2.1:1986 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CPW/36, Cinematography, wh
4、ich has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue und
5、er the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct a
6、pplication. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed
7、; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 6, an inside back cover and a back cover. The BSI copyright date disp
8、layed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 2906:2002(E) INTERNATIONAL STANDARD ISO 2906 T
9、hird edition 2002-02-15 Cinematography Image area produced by camera aperture on 35 mm motion- picture film Position and dimensions Cinmatographie Surface dimage dlimite par la fentre de la camra sur les films cinmatographiques 35 mm Position et dimensions Licensed Copy: sheffieldun sheffieldun, na,
10、 Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2906:2002(E) ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2906:2002(E) iii Foreword ISO (the International Organization for Standardization) is a worldwide federat
11、ion 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 committe
12、e. 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
13、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 app
14、roval 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 Te
15、chnical Committee ISO/TC 36, Cinematography. This third edition cancels and replaces the second edition (ISO 2906:1984), which has been technically revised. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffield
16、un, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 2906:2002(E) I SO 2002 All irthgs ersedevr 1 Cinematography Image area produced by camera aperture on 35 mm motion-picture film Position and dimensions 1 Scope This International Standard specifies the
17、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 pu
18、rposes 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
19、 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 c
20、ameras. 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
21、 film, with the vertical edge parallel to the edge of the film. 3 Emulsion position The emulsion shall be towards the camera lens, as shown in Figure 4. 4 Frame rate The standard frame rate for motion-picture photography is 24 frames per second. However, it is recognized that nonstandard frame rates
22、 are sometimes used for specific applications. For example, 24, 25 or 30 frames per second may be used for motion pictures intended for television; higher or lower frame rates may be used for special motion-picture effects and analysis. The use of nonstandard frame rates requires notification and ag
23、reement of all parties concerned with the use of the particular film. NOTE The displacement of 1,27 mm (0,050 in), dimension G, of the vertical centreline of the image area for styles A and B is in accordance with current usage of low-shrinkage film base. However, many cameras are in use in which th
24、e vertical centreline is displaced by 1,40 mm (0,055 in), the dimension which was used prior to the development of low-shrinkage film base. 1 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2906:2002(E) 2 I SO 2002 Allr ithgsr ese devr F
25、ilm as seen from inside the camera looking towards camera lens Key 1 Centre lines of the intended image area 2 Centre line of film 3 Style A 4 Style B 5 Reference edge 6 Travel Figure 1 Styles A and B camera aperture image area Table 1 Style A specifications Dimension mm in A 22,00 nom. 0,866 nom. B
26、 0,5 0 16,00+ 0,02 0 0,630+ C 18,75 0,05 0,738 0,002 D 7,75 max. 0,305 max. E 29,74 min. 1,171 min. F 2,95 nom. 0,116 nom. G 1,27 nom. 0,050 nom. H 2,36 0,05 0,093 0,002 R 0,80 max. 0,03 max. Table 2 Style B specifications Dimension mm in B 0,20 0 18,59+ 0,008 0 0,732+ 2 Licensed Copy: sheffieldun s
27、heffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2906:2002(E) ISO 2002 Allr ithgsr esedevr 3 Key 1 Centre lines of the intended image area 2 Reference edge 3 Travel Figure 2 Style C camera aperture image area Table 3 Style C specifications Dimension mm in A 24,92 no
28、m. 0,981 nom. B 18,67 0,05 0,735 0,002 C 17,48 0,05 0,688 0,002 D 5,03 max. 0,198 max. E 29,95 min. 1,179 min. F 0,23 nom. 0,009 nom. H 2,36 0,05 0,093 0,002 R 0,8 max. 0,03 max. 3 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2906:200
29、2(E) 4 I SO 2002 Allr ithgsr ese devr Key 1 Centre line of film 2 Reference edge 3 Travel Figure 3 Style D camera aperture image area Table 4 Style D specifications Dimension mm in A 24,92 nom. 0,981 nom. B 13,87 0,546 C 17,48 0,688 D 5,03 max. 0,198 max. E 29,95 min. 1,179 min. F 0,23 nom. 0,009 no
30、m. R 0,51 max. 0,020 max. 4 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2906:2002(E) ISO 2002 Allir thgser sedevr 5 Key 1 Image-forming light 2 Reference edge 3 Travel Figure 4 Film viewed from inside camera looking towards camera le
31、ns 5 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2906:2002(E) 6 ISO 2002 Allir thgser se devr Bibliography 1 ISO 23:1993, Cinematography Camera usage of 35 mm motion-picture film Specifications 2 ISO 491:1995, Cinematography 35 mm mo
32、tion-picture film and magnetic film Cutting and perforating dimensions 3 ISO 2907:1984, Cinematography Maximum projectable image area on 35 mm motion-picture film Position and dimensions 4 ISO 2939:1986, Cinematography Picture image area and photographic sound record on 35 mm motion- picture release
33、 prints Position and dimensions 5 ISO 4238:1976, Cinematography Optical printing ratios for enlargement and reduction of motion-picture film images Specifications 6 DIN 15502-6:1982, Film 35 mm; image produced by camera aperture and projected image area, aspect ratio 1,33:1 7 SMPTE 59-1998, SMPTE St
34、andard for Motion-Picture Film (35 mm) Camera Aperture Images and Usage 6 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:12:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2906:
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