ISO/TS 20490:2024

Measuring autofocus repeatability of sharpness and latency

This document is focused on measuring the autofocus (AF) repeatability of sharpness and latency, meaning camera system’s capability to produce sharp images within certain time frame. The scope of document is limited to testing autofocus sharpness and latency repeatability with stationary charts only as testing with moving charts is not covered.

Mesure de la répétabilité de la netteté et de la latence de l’autofocus

General Information

• Status: Published
• Publication Date: 12-Mar-2024
• ICS: 37.040.10 - Photographic equipment. Projectors
• Technical Committee: ISO/TC 42 - Photography
• Drafting Committee: ISO/TC 42 - Photography
• Current Stage: 6060 - International Standard published
• Start Date: 13-Mar-2024
• Due Date: 23-May-2025
• Completion Date: 13-Mar-2024

Standards Content (Sample)

Technical
Specification
ISO/TS 20490
First edition
Measuring autofocus repeatability
2024-03
of sharpness and latency
Mesure de la répétabilité de la netteté et de la latence de
l’autofocus
Reference number
ISO/TS 20490:2024(en) © ISO 2024

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ISO/TS 20490:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2024
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 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland

© ISO 2024 – All rights reserved
ii

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ISO/TS 20490:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions and abbreviated terms . 1
4 Test description . 2
4.1 General .2
4.2 Test device settings .2
4.3 Environmental conditions .2
4.4 Apparatus and hardware .2
4.5 Test distance .4
4.6 Test charts .4
4.6.1 General .4
4.6.2 Recommended test charts .5
4.7 Test conditions .5
4.8 Sharpness measurement .6
5 Autofocus measurement . 6
5.1 General .
...

FINAL
TECHNICAL ISO/DTS
DRAFT
SPECIFICATION 20490
ISO/TC 42
Measuring autofocus repeatability of
Secretariat: ANSI
sharpness and latency
Voting begins on:
2023-12-11
Mesure de la répétabilité de la netteté et de la latence de l’autofocus
Voting terminates on:
2024-02-05
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/DTS 20490:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/DTS 20490:2023(E)
FINAL
TECHNICAL ISO/DTS
DRAFT
SPECIFICATION 20490
ISO/TC 42
Measuring autofocus repeatability of
Secretariat: ANSI
sharpness and latency
Voting begins on:
Mesure de la répétabilité de la netteté et de la latence de l’autofocus
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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 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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/DTS 20490:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

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ISO/DTS 20490:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions and abbreviated terms . 1
4 Test description . 2
4.1 General . 2
4.2 Test device settings . 2
4.3 Environmental conditions . 2
4.4 Apparatus and hardware . 2
4.5 Test distance . 4
4.6 Test charts . 5
4.6.1
...

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ISO/DTS 20490:2023(E) .
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ISO /TC 42/WG 18
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Secretariat: ANSI
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Date: 2023-10-24xx
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Measuring auto-focusautofocus repeatability of sharpness and
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latency .
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Mesure de la répétabilité de la netteté et de la latence de l’autofocus
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ISO/DTS 20490:2023(:(E)
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© ISO 2023
single
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this
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publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical,
Footer distance from edge: 0.5 cm
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. Commented [eXtyles1]: The reference is to a withdrawn
standard which has been replaced

ISO copyright office
ISO 20344, Personal protective equipment — Test methods
CP 401 • Ch. de Blandonnet 8
for footwear
CH-1214 Vernier, Geneva
Formatted: Default Paragraph Font
Phone: + 41 22 749 01 11
EmailE-mail: [e-mail]
Formatted: Default Paragraph Font
Website: www.iso.orgwww.iso.org
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between Latin and Asian text, Adjust space between
Published in Switzerland
Asian text and numbers
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
Formatted: French (Switzerland)
Formatted: French (Switzerland)
Formatted: French (Switzerland)
ii © ISO 2023 – All rights reserved
ii © ISO 2023 – All rights reserved

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ISO/DTS 20490:2023(:(E)
Formatted: Font: 11 pt
Formatted: Font: 11 pt
Formatted: Header, Left, Space After: 0 pt, Line spacing:
Contents
single
Foreword .vi
Introduction. vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions and abbreviated terms . 1
4 Test description . 2
4.1 General . 2
4.2 Test device settings . 2
4.3 Environmental conditions . 2
4.4 Apparatus and hardware . 2
4.5 Test distance .
...