British Library Cataloging-in-Publication Data A catalogue record for this book is available from the British Library. Library of Congress Cataloging-in-Publication Data Application submitted. Recognizing the importance of preserving what has been written, Elsevier prints its books on acid-free paper whenever possible. Permissions may be sought directly from Elsevier’s Science & Technology Rights Department in Oxford, UK: phone: (+44) 1865 843830, fax: (+44) 1865 853333, e-mail: You may also complete your request on-line via the Elsevier homepage (), by selecting “Customer Support” and then “Obtaining Permissions”. No part of this publication may be reproduced, stored in a rerieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. TOKYO Focal Press is an imprint of Elsevierįocal Press is an imprint of Elsevier 200 Wheeler Road, Burlington, MA 01803, USA Linacre House, Jordan Hill, Oxford OX2 8DP, UK Copyright © 2004, Elsevier Inc.Image focus (focus adjustment) is maintained at all focal lengths (zoom-in) and constant distance from object by means of back focal distance adjustment.The EDCF Guide to Digital Cinema Production If necessary optimize by alternating with optical focus adjustment.Ģ、With unchanged optical focus adjustment and shortest focal length adjust the red and blue pick-up tube until optimum focus is achieved.

With shortest focal length and divergent focus adjust the pick-up tube in W-channel until optimum focus is achieved. Set optical focus at greatest focal length. With the aid of a low transmission filter and by means of low level lighting make sure that the camera is not over modulated with the aperture in the open position.Ī) Optical focus: Adjust focus of zoom lens at greatest focal length.ī) Back focal distance (lens): Adjust focus at shortest focal length by regulating lens mechanically with adjustment screw and optimize alternatively with a).Ĭ) Back focal distance (pick-up tubes): If focus varies from channel to channel between greatest and shortest focal length, the individual pick-up tubes must be adjusted mechanically in the optical axis.ġ、Select white channel. It shows a 36 sector Siemens star on a white background.

The YE0120 test chart is designed for the adjustment of camera lenses and checking back focal distance.

Zeiss modified siemens star chart pdf