ISO INTERNATIONAL STANDARD 2240 Fourth edition 2003-10-15 Photography Colour reversal camera films Determination of isO speed Photographie - Films de prise de vue inversibles en couleur - Détermination de la sensibilite /so Reference number ISO 2240:2003(E) ISO @ ISO 2003 itted without license from IHS Not for Resale ISO 2240:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. 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. ?ISO2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's memberbody in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 4122 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland Copyihtinteratinal organization for Standardization @ ISO 2003 - All rights reserved itted without license from IHS Not for Resale ISO2240:2003(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 non-governmental, in liaison with isO, also take part in the work. isO collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. 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 document may be the subject of patent ISO 2240 was prepared by Technical Committee ISO/TC 42, Photography. This fourth edition cancels and replaces the third edition (isO 2240:1994), which has been technically revised. ii ISO2240:2003(E) Introduction and, where applicable, automatic exposure controls for cameras conforming to isO 2721; the resultant suitable for viewing at normal luminance levels. For the purpose of this International Standard, the normal luminance of transparency illuminators is assumed luminance of transparency projection screens is assumed to be about 137 cd/m?. 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 by 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 for the lower screen luminance of the usual projection conditions (see IsO 2721). ionalOrganizationfor Standardization @ ISO 2003 - All rights reserved Copyright Interr Not for Resale INTERNATIONAL STANDARD ISO 2240:2003(E) Photography Colour reversal camera films Determination of IsO speed Scope This International Standard specifies the method for determining the IsoO speed of colour reversal camera or by projection as slides. It also applies to 8 mm and 16 mm motion-picture films u