ISO 2721:2013

Photography — Film-based cameras — Automatic controls of exposure

ISO 2721:2013 specifies the exposure at the focal plane of film-based cameras for values of two exposure parameters, i.e. field luminance and film speed, and also describes methods of evaluating other photometric characteristics, such as the acceptance angles of the photoelectric system. ISO 2721:2013 applies to automatic exposure control systems which are built into film-based cameras or coupled with them to regulate the exposure in the focal plane as a function of the several exposure parameters.

Photographie — Appareils de prise de vues à film — Commandes automatiques de l'exposition

Fotografija - Kamere - Avtomatski nadzor ekspozicije

General Information

• Status: Published
• Publication Date: 04-Mar-2013
• ICS: 37.040.10 - Photographic equipment. Projectors
• Technical Committee: ISO/TC 42 - Photography
• Drafting Committee: ISO/TC 42 - Photography
• Parallel Committee: ISO/TC 130 - Graphic technology
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 20-Dec-2023
• Ref Project: SIST ISO 2721:2014 - Photography - Film-based cameras - Automatic controls of exposure

Relations

• Revises: ISO 2721:1982 - Photography — Cameras — Automatic controls of exposure
• Effective Date: 15-Sep-2012

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ISO 2721:2014
01-marec-2014
1DGRPHãþD
SIST ISO 2721:2011
Fotografija - Kamere - Avtomatski nadzor ekspozicije
Photography - Film-based cameras - Automatic controls of exposure
Photographie - Appareils de prise de vues à film - Commandes automatiques de
l'exposition
Ta slovenski standard je istoveten z: ISO 2721:2013
ICS:
37.040.10 Fotografska oprema. Photographic equipment.
Projektorji Projectors
SIST ISO 2721:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ISO 2721:2014

---------------------- Page: 2 ----------------------

SIST ISO 2721:2014
INTERNATIONAL ISO
STANDARD 2721
Second edition
2013-03-01
Photography — Film-based cameras —
Automatic controls of exposure
Photographie — Appareils de prise de vues à film — Commandes
automatiques de l’exposition
Reference number
ISO 2721:2013(E)
©
ISO 2013

---------------------- Page: 3 ----------------------

SIST ISO 2721:2014
ISO 2721:2013(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2013
All rights reserved. Unless otherwise specified, 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 on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

---------------------- Page: 4 ----------------------

SIST ISO 2721:2014
ISO 2721:2013(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specific requirements . 2
4.1 Scales . 2
4.2 Out-of-range indication . 2
4.3 The sensors of exposure controls . 2
5 Calibration of the exposure controls . 3
5.1 Method of calibration . 3
5.2 Light source for calibration . 3
5.3 General test conditions . 3
5.4 Exposure in the focal plane . 4
6 Acceptance angles of the photoelectric system . 4
6.1 Specific acceptance angle .
...

INTERNATIONAL ISO
STANDARD 2721
Second edition
2013-03-01
Photography — Film-based cameras —
Automatic controls of exposure
Photographie — Appareils de prise de vues à film — Commandes
automatiques de l’exposition
Reference number
ISO 2721:2013(E)
©
ISO 2013

---------------------- Page: 1 ----------------------
ISO 2721:2013(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2013
All rights reserved. Unless otherwise specified, 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 on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 2721:2013(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specific requirements . 2
4.1 Scales . 2
4.2 Out-of-range indication . 2
4.3 The sensors of exposure controls . 2
5 Calibration of the exposure controls . 3
5.1 Method of calibration . 3
5.2 Light source for calibration . 3
5.3 General test conditions . 3
5.4 Exposure in the focal plane . 4
6 Acceptance angles of the photoelectric system . 4
6.1 Specific acceptance angle . 4
6.2 Oblique acceptance angles . 4
Annex A (normative) Measurement of light exposure in the focal plane and calibration of
measuring instrument . 5
Annex B (normative) Size of measuring area . 8
An
...