ISO INTERNATIONAL STANDARD 14490-5 Third edition 2021-06 Optics and photonics Test methods for telescopic systems - Part 5: Test methods for transmittance Optique et photonique - Meéthodes d'essai pour systemes telescopiques Partie 5: Methodes d'essai du facteur de transmission Reference number IS0 14490-5:2021(E) ISO @ ISO 2021 IS0 14490-5:2021(E) COPYRIGHTPROTECTED DOCUMENT IS02021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below or Iso's member body in the country of the requester. IsO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved