ISO-2240-2003.pdf
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1、 Reference number ISO 2240:2003(E) ISO 2003 INTERNATIONAL STANDARD ISO 2240 Fourth edition 2003-10-15 Photography Colour reversal camera films Determination of ISO speed Photographie Films de prise de vue inversibles en couleur Dtermination de la sensibilit ISO Copyright International Organization f
2、or Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 08:00:59 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 2240:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In acco
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5、ting. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2003 All rights reserved. Unless otherwise specified, no part of this
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7、Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2003 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not f
8、or Resale, 04/22/2007 08:00:59 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 2240:2003(E) ISO 2003 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The
9、 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-gove
10、rnmental, 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 2. T
11、he 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 vot
12、e. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 2240 was prepared by Technical Committee ISO/TC 42, Photography. This fourth edition cancels a
13、nd replaces the third edition (ISO 2240:1994), which has been technically revised. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 08:00:59 MDTNo reproduction or networking permi
14、tted without license from IHS -,-,- ISO 2240:2003(E) iv ISO 2003 All rights reserved Introduction The ISO speeds are intended to provide correct exposures with exposure meters conforming to ISO 2720, and, where applicable, automatic exposure controls for cameras conforming to ISO 2721; the resultant
15、 camera exposure will normally lead to colour transparencies or motion pictures of the best quality. For an average scene and average camera, the indicated camera exposure will be approximately midway between the least exposure and the greatest exposure required to produce transparencies and motion-
16、picture films suitable for viewing at normal luminance levels. For the purpose of this International Standard, the normal luminance of transparency illuminators is assumed to be that described in ISO 3664 with a ratio of direct-to-ambient luminance of about 40:1. The normal luminance of transparency
17、 projection screens is assumed to be about 137 cd/m2. Screen luminance of 8 mm Type R and 8 mm Type S (Super-8) motion-picture film projection is assumed to range from approximately 40 cd/m2 (see ISO 2910) to 62 cd/m2. Therefore, it may be desirable to increase exposure by 25 % above that obtained b
18、y using the speed derived by following the sensitometric procedure described in this International Standard. Many camera manufacturers design and calibrate their 8 mm Type R and 8 mm Type S motion-picture cameras with an adjustment which permits more exposure to compensate for the lower screen lumin
19、ance of the usual projection conditions (see ISO 2721). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 08:00:59 MDTNo reproduction or networking permitted without license from I
20、HS -,-,- INTERNATIONAL STANDARD ISO 2240:2003(E) ISO 2003 All rights reserved 1 Photography Colour reversal camera films Determination of ISO speed 1 Scope This International Standard specifies the method for determining the ISO speed of colour reversal camera films producing continuous-tone pictori
21、al images that are intended to be viewed on transparency illuminators or by projection as slides. It also applies to 8 mm and 16 mm motion-picture films used in non-professional applications. This International Standard is not applicable to professional motion-picture films regardless of their appli
22、cations. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5-2, Photogra
23、phy Density measurements Part 2: Geometric conditions for transmission density ISO 5-3, Photography Density measurements Part 3: Spectral conditions ISO 7589, Photography Illuminants for sensitometry Specifications for daylight, incandescent tungsten and printer 3 Terms and definitions For the purpo
24、ses of this document, the following terms and definitions apply. 3.1 exposure H time integral of illuminance on the film NOTE 1 In the International lighting vocabulary8, H is defined as the luminous exposure. In this International Standard, “luminous exposure“ is simply referred to as “exposure“. N
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