1、BRITISH STANDARD BS 5550-1.2.1: 1978 ISO 74:1976 Cinematography Part 1: 8 mm film Section 1.2 Image areas Subsection 1.2.1 Specification for positions and dimensions of the image area produced by camera aperture and maximum projectable image area on8mm Type R motion-picture film UDC 778.5.068.24:771
2、.537.068 * RBS5550-1.2.1:1978 This British Standard, having been prepared under the directionof the CinematographStandards Committee, was published underthe authority of the Executive Board on 28February1978 BSI 10-1999 The following BSI references relate to the work on this standard: Committee refe
3、rence CMS/3 Draft for comment 75/71794 ISBN 0 580 09887 X Cooperating organizations The Cinematograph Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government department and scientific and industrial organizations: Assoc
4、iation of Cinematograph, Television and Allied Technicians* British Broadcasting Corporation* British Film Institute* British Kinematograph, Sound and Television Society* British Photographic Manufacturers Association Cinematograph Exhibitors Association of Great Britain and Ireland* Federation of S
5、pecialised Film Associations Film Laboratory Association Film Production Association of Great Britain Health and Safety Executive Illuminating Engineering Society Incorporated Association of Kinematograph Manufacturers Ltd. Independent Television Companies Association* Kinematograph Renters Society
6、Ltd. Royal Photographic Society The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Association of Independent Cinemas Institute of Amateur Cinematographers Natio
7、nal Association of Theatrical, Television attention is especially drawn to the following. Where the words “International Standard” appear, referring to this standard, they should be interpreted as “British Standard”. The comma has been used in some places as a decimal marker. In British Standards it
8、 is current practice to use a full point on the baseline as the decimal marker. Cross-references. The International Standards listed inclause2 are given for information purposes only. The following are, or are being, implemented as Subsections of BS5550; the relevant BS numbers are as given below: A
9、 British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. ISO 28 BS 5550-1.3.1 ISO 29 BS 5550-1.7.2
10、a ISO 486 BS 5550-1.1.4 ISO 1201 BS 5550: Subsection . . . . a(currently BS 2981 corresponds) a In course of preparation. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 and 2, an inside back cover and a back cover. This standard has been updated
11、 (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5550-1.2.1:1978 BSI 10-1999 1 1 Scope and field of application This International Standard specifies the location and dimensions of the image area produced by the
12、 camera aperture on8mm TypeR motion-picture film, and the dimensions of the maximum film image area intended for projection. 2 References ISO 28, Cinematography Camera usage of8mm TypeR motion-picture film Specifications. ISO 29, Cinematography Projector usage of8mm motion-picture film for direct fr
13、ont projection 1) . ISO 486, Cinematography 16mm motion-picture film perforated8mm TypeR Cutting and perforating dimensions. ISO 1201, Cinematography 8mm motion-picture film with picture Location and width of magnetic striping and gaps of recording and reproducing magnetic heads for magnetic sound r
14、ecord. 3 Dimensions The dimensions shall be as shown in the figures and given in the tables. NOTE 1The “reference edge” is the edge of the film which forms the datum for the specified dimensions; it is not necessarily the edge of the film which is guided in the camera or projector. NOTE 2Dimensions
15、A 1 , D 1 , and H 1define the maximum image area on the film that is available for projection. They do not define the opening in the aperture plate of a projector. NOTE 3It is recognized that in many cases the actual film image area that is projected may be smaller than the projectable maximum. It i
16、s intended, however, that the actual projected film image area be the largest appropriately shaped figure that can be inscribed within the specified dimensions as the designing and technological features of the projector permit. 1) In preparation. (Revision of ISO/R 29.) Figure 1 Image area produced
17、 by camera apertureBS5550-1.2.1:1978 2 BSI 10-1999 Table 1 Dimension of camera aperture image Table 2 Dimension of the maximum projectable area Dimension mm in A max. 2,87 0.113 B nominal a 4,90 0.193 C nominal 5,21 0.205 D max. b 7,87 0.310 min. 7,54 0.297 H 3,60 0,10 0.142 0.004 R max. 0,25 0.010
18、E = F within 0,20 mm or 0.008 in K = J (nominal) a For information only. b The D dimension of the camera image is shown as a maximum to prevent exposure into the adjacent8mm area. Dimension mm in A 1min. 2,92 0.115 B 1nominal a 4,55 0.179 C 1nominal 5,21 0.205 D 1max. 7,54 0.297 H 1max. 3,40 0.134 R
19、 1max. 0,25 0.010 a For information only. Figure 2 Maximum projectable image areaBS5550-1.2.1:1978 BSI 10-1999 Publications referred to See national forewordBS 5550-1.2.1: 1978 ISO 74:1976 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body re
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