ISO 2240:1994

Photography — Colour reversal camera films — Determination of ISO speed

Cancels and replaces the first edition (1982). Gives the method for determining the ISO speed of colour reversal camera films producing continuous-tone pictorial images that are intended to be viewed on transparency illuminators or by projection as slides. Also applies to 8 mm and 16 mm motion-picture films used in non-professional applications. Does not apply to professional motion-picture films regardless of their applications.

Photographie — Films de prise de vue inversibles en couleur — Détermination de la sensibilité ISO

Photography - Colour reversal camera films - Determination of ISO speed

General Information

• Status: Withdrawn
• Publication Date: 17-Aug-1994
• Withdrawal Date: 17-Aug-1994
• ICS: 37.040.20 - Photographic paper, films and plates. Cartridges
• Technical Committee: ISO/TC 42 - Photography
• Drafting Committee: ISO/TC 42/WG 3 - Image measurement, viewing and sensitometry
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 22-Oct-2003
• Ref Project: SIST ISO 2240:1997 - Photography -- Colour reversal camera films -- Determination of ISO speed

Relations

• Revised: ISO 2240:2003 - Photography — Colour reversal camera films — Determination of ISO speed
• Effective Date: 15-Apr-2008
• Revised: SIST ISO 2240:2004 - Photography -- Colour reversal camera films -- Determination of ISO speed
• Effective Date: 12-May-2008
• Revises: ISO 2240:1982 - Photography — Colour reversal camera films — Determination of ISO speed
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 2240
Second edition
1994-09-0 1
Photography - Colour reversal Camera
films - Determination of ISO Speed
- Films de Prise de vue inversibles en couleur -
Photographie
Determination de Ia sensibilit6 ISO
Reference number
ISO 2240:1994(E)

---------------------- Page: 1 ----------------------
ISO 2240: 1994(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
technical committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
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.
International Standard ISO 2240 was prepared by Technical Committee
ISO/TC 42, Photography.
replaces the first edition
This second edition cancels and
(ISO 2240:1982), of which it constitutes a technical revision.
Annex A of this International Standard is for information only.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
mrcrofilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Pnnted In Switzerland

---------------------- Page: 2 ----------------------
0 ISO
ISO 2240: 1994(E)
Introduction
ISO Speeds are intended to provide correct exposures with exposure
meters conforming to ISO 2720, and, where applicable, automatic ex-
posure controls for cameras conforming to ISO 2721; the resultant Camera
exposure will normally lead to colour transparencies or motion pictures of
the best quality. For an average Scene and average Camera, the indicated
Camera exposure will be approximately midway between the least ex-
posure and the greatest exposure required to produce transparencies and
motion-picture films suitable for viewing at normal luminance Ievels.
For the purposes of this International Standard, the normal luminance of
transparency illuminators is assumed to be that described in ISO 3664,
with a ratio of direct-to-ambient luminance of about 4O:l. The normal
Iuminance of transparency projection screens is assumed to be about
137 cd/m2.
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 fol-
lowing the sensitometric procedure described in this International Stan-
dard. Many Camera manufacturers design and calibrate their 8 mm
Type R and 8 mm Type S motion-picture cameras with an adjustment
which permits more exposure to compensate for the lower Screen
luminance of the usual projection conditions (see ISO 2721).
. . .
Ill

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This page intentionally left blank

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD 0 ISO ISO 2240: 1994(E)
Photography - Colour reversal Camera films -
Determination of ISO Speed
ISO 5-3: -l), Photography - Density measuremen ts
1 Scope
- Part 3: Spectral conditions.
This International Standard specifies the method for
ISO 7589:1984, Photography - Illuminants for
determining the ISO Speed of colour reversal Camera
sensitome try - Speci fica tions for da yligh t and incan-
films producing continuous-tone pictorial images that
descent tungsten.
are intended to be viewed on transparency illumi-
nators or by projection as slides. lt also applies to
8 mm and 16 mm motion-picture films used in non- 3 Definitions
professional applications.
For the purposes of this International Standard, the
following definitions apply.
This International Standard does not apply to pro-
fessional motion-picture films regardless of their
3.1 exposure, Hz): Time integral of illuminance on
applications.
the film, measured in lux seconds.
NOTE 1 Exposure is often expressed in log,@ units.
3.2 Speed: Quantitative measure of the response of
the photographic material to radiant energy for the
specified conditions of exposure, processing, density
measurement and analysis.
2 Normative references
3.3 minimum density: Minimum density value ob-
tainable following the process used in the ISO Speed
The following Standards contain provisions which,
determination.
through reference in this text, constitute provisions
of this International Standard. At the time of publi-
cation, the editions indicated were valid. All Standards 4 Sampling and storage
are subject to revision, and Parties to agreements
In determining the ISO Speed of a product, it is im-
based on this International Standard are encouraged
portant that the samples evaluated yield the average
to investigate the possibility of applying the most re-
results obtained by users. This will require evaluating
cent editions of the Standards indicated below.
several different batches periodically under the con-
Members of IEC and ISO maintain registers of cur-
ditions specified in this International Standard. Prior to
rently valid International Standards.
evaluation, the samples shall be stored according to
ISO 5-2: 1991, Photography - Density measurements the manufacturers’ recommendations for a length of
- Part 2: Geometrie conditions for transmission time to simulate the average age at which the product
density. is normally used. To assure that all components of
1) To be published. (Revision of ISO 5-3:1984)
2) International Lighting Vocabulary, CIE Publ. No. 17.4, 1987, luminous exposure, H. In this International Standard, “luminous
exposure” is simply referred to as “exposure ”.

---------------------- Page: 5 ----------------------
Q ISO
ISO 2240: 1994(E)
variance are included in the sampling plan, it is rec- 5.3.4 Modulation
ommended that procedures such as those outlined in
The total range of spectral diffuse transmission den-
ISO Standards Handbook 3 be used. The objective in
sity with respect to the film plane of each area of the
selecting and storing samples as described above is
light modulator throughout the wavelength interval
to ensure the film characteristics are representative
from 400 nm to 700 nm shall not exceed 5 % of the
of those obtained by a photographer at the time of
average density obtained over the same interval or
use.
0,03 density, whichever is greater. In the interval from
360 nm to 400 nm, IO % of this same average den-
5 Test method
sity, or 0,06 density, whichever is greater, is accept-
able.
5.1 Principle
If a stepped increment modulation is used, the ex-
posure increment shall not be greater than
Samples are exposed and processed in the manner
0,i 5 log,& The width and length of a Single step
specified below. Density measurements are obtained
shall be adequate to obtain a uniform density within
from the resultant images to produce a sensitometric
the reading aperture specified for densitometry.
curve from which values are taken and used to de-
termine ISO Speed.
If a continuous variable modulator is used, the Change
in exposure with distance along the test Strip shall be
uniform and not greater than 0,04 log,$ per milli-
5.2 Safelights
metre.
To eliminate the possibility of safelight illumination
affecting the sensitometric results, all films shall be
5.3.5 Exposure time
handled in complete darkness during Sample prepara-
tion, exposing and processing. The exposure time shall be between 5 s and
l/l 000 s correspond
...

SLOVENSKI STANDARD
SIST ISO 2240:1997
01-september-1997
Photography - Colour reversal camera films - Determination of ISO speed
Photography -- Colour reversal camera films -- Determination of ISO speed
Photographie -- Films de prise de vue inversibles en couleur -- Détermination de la
sensibilité ISO
Ta slovenski standard je istoveten z: ISO 2240:1994
ICS:
37.040.20 )RWRJUDIVNLSDSLUILOPLLQ Photographic paper, films
IRWRJUDIVNHSORãþH)LOPVNL and cartridges
]YLWNL
SIST ISO 2240:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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

SIST ISO 2240:1997

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

SIST ISO 2240:1997
INTERNATIONAL ISO
STANDARD 2240
Second edition
1994-09-0 1
Photography - Colour reversal Camera
films - Determination of ISO Speed
- Films de Prise de vue inversibles en couleur -
Photographie
Determination de Ia sensibilit6 ISO
Reference number
ISO 2240:1994(E)

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

SIST ISO 2240:1997
ISO 2240: 1994(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
technical committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
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.
International Standard ISO 2240 was prepared by Technical Committee
ISO/TC 42, Photography.
replaces the first edition
This second edition cancels and
(ISO 2240:1982), of which it constitutes a technical revision.
Annex A of this International Standard is for information only.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
mrcrofilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Pnnted In Switzerland

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

SIST ISO 2240:1997
0 ISO
ISO 2240: 1994(E)
Introduction
ISO Speeds are intended to provide correct exposures with exposure
meters conforming to ISO 2720, and, where applicable, automatic ex-
posure controls for cameras conforming to ISO 2721; the resultant Camera
exposure will normally lead to colour transparencies or motion pictures of
the best quality. For an average Scene and average Camera, the indicated
Camera exposure will be approximately midway between the least ex-
posure and the greatest exposure required to produce transparencies and
motion-picture films suitable for viewing at normal luminance Ievels.
For the purposes of this International Standard, the normal luminance of
transparency illuminators is assumed to be that described in ISO 3664,
with a ratio of direct-to-ambient luminance of about 4O:l. The normal
Iuminance of transparency projection screens is assumed to be about
137 cd/m2.
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 fol-
lowing the sensitometric procedure described in this International Stan-
dard. Many Camera manufacturers design and calibrate their 8 mm
Type R and 8 mm Type S motion-picture cameras with an adjustment
which permits more exposure to compensate for the lower Screen
luminance of the usual projection conditions (see ISO 2721).
. . .
Ill

---------------------- Page: 5 ----------------------

SIST ISO 2240:1997
This page intentionally left blank

---------------------- Page: 6 ----------------------

SIST ISO 2240:1997
INTERNATIONAL STANDARD 0 ISO ISO 2240: 1994(E)
Photography - Colour reversal Camera films -
Determination of ISO Speed
ISO 5-3: -l), Photography - Density measuremen ts
1 Scope
- Part 3: Spectral conditions.
This International Standard specifies the method for
ISO 7589:1984, Photography - Illuminants for
determining the ISO Speed of colour reversal Camera
sensitome try - Speci fica tions for da yligh t and incan-
films producing continuous-tone pictorial images that
descent tungsten.
are intended to be viewed on transparency illumi-
nators or by projection as slides. lt also applies to
8 mm and 16 mm motion-picture films used in non- 3 Definitions
professional applications.
For the purposes of this International Standard, the
following definitions apply.
This International Standard does not apply to pro-
fessional motion-picture films regardless of their
3.1 exposure, Hz): Time integral of illuminance on
applications.
the film, measured in lux seconds.
NOTE 1 Exposure is often expressed in log,@ units.
3.2 Speed: Quantitative measure of the response of
the photographic material to radiant energy for the
specified conditions of exposure, processing, density
measurement and analysis.
2 Normative references
3.3 minimum density: Minimum density value ob-
tainable following the process used in the ISO Speed
The following Standards contain provisions which,
determination.
through reference in this text, constitute provisions
of this International Standard. At the time of publi-
cation, the editions indicated were valid. All Standards 4 Sampling and storage
are subject to revision, and Parties to agreements
In determining the ISO Speed of a product, it is im-
based on this International Standard are encouraged
portant that the samples evaluated yield the average
to investigate the possibility of applying the most re-
results obtained by users. This will require evaluating
cent editions of the Standards indicated below.
several different batches periodically under the con-
Members of IEC and ISO maintain registers of cur-
ditions specified in this International Standard. Prior to
rently valid International Standards.
evaluation, the samples shall be stored according to
ISO 5-2: 1991, Photography - Density measurements the manufacturers’ recommendations for a length of
- Part 2: Geometrie conditions for transmission time to simulate the average age at which the product
density. is normally used. To assure that all components of
1) To be published. (Revision of ISO 5-3:1984)
2) International Lighting Vocabulary, CIE Publ. No. 17.4, 1987, luminous exposure, H. In this International Standard, “luminous
exposure” is simply referred to as “exposure ”.

---------------------- Page: 7 ----------------------

SIST ISO 2240:1997
Q ISO
ISO 2240: 1994(E)
variance are included in the sampling plan, it is rec- 5.3.4 Modulation
ommended that procedures such as those outlined in
The total range of spectral diffuse transmission den-
ISO Standards Handbook 3 be used. The objective in
sity with respect to the film plane of each area of the
selecting and storing samples as described above is
light modulator throughout the wavelength interval
to ensure the film characteristics are representative
from 400 nm to 700 nm shall not exceed 5 % of the
of those obtained by a photographer at the time of
average density obtained over the same interval or
use.
0,03 density, whichever is greater. In the interval from
360 nm to 400 nm, IO % of this same average den-
5 Test method
sity, or 0,06 density, whichever is greater, is accept-
able.
5.1 Principle
If a stepped increment modulation is used, the ex-
posure increment shall not be greater than
Samples are exposed and processed in the manner
0,i 5 log,& The width and length of a Single step
specified below. Density measurements are obtained
shall be adequate to obtain a uniform density within
from the resultant images to produce a sensitometric
the reading aperture spe
...