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GB/T 2924-2008: Photography -- Colour negative films for still photography -- Determination of ISO speed
Status: Valid GB/T 2924: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 2924-2008 | English | 174 |
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Photography -- Colour negative films for still photography -- Determination of ISO speed
| Valid |
GB/T 2924-2008
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| GB/T 2924-1995 | English | 279 |
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Determination of ISO speed of colour negative films for photography
| Obsolete |
GB/T 2924-1995
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| GB 2924-1982 | English | 199 |
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Method for determination of speed of color negative films for photography
| Obsolete |
GB 2924-1982
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PDF similar to GB/T 2924-2008
Basic data | Standard ID | GB/T 2924-2008 (GB/T2924-2008) | | Description (Translated English) | Photography -- Colour negative films for still photography -- Determination of ISO speed | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G80 | | Classification of International Standard | 37.040.20 | | Word Count Estimation | 9,93 | | Date of Issue | 2008-06-18 | | Date of Implementation | 2009-02-01 | | Older Standard (superseded by this standard) | GB/T 2924-1995 | | Quoted Standard | GB/T 11500; GB/T 11501; ISO 2720; ISO 7589 | | Adopted Standard | ISO 5800-1987, IDT | | Regulation (derived from) | National Standard Approval Announcement 2008 No.10 (Total No.123) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the method for determination of color negative film ISO sensitivity of the camera for still photography. Obtained from color negative film is mainly used for the production of these reflective color photographs can also be used to produce color transparencies. Application of this standard can be used to get the exposure sensitivity table in the actual shooting, exposure and exposure calculator table. This standard does not apply to aerial photography and cinematography and production of intermediate negatives with color negative film. | GB/T 2924-2008: Photography -- Colour negative films for still photography -- Determination of ISO speed
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Photography. Colour negative films for still photography. Determination of ISO speed
ICS 37.040.20
G80
National Standards of People's Republic of China
GB/T 2924-2008/ISO 5800. 1987
Replacing GB/T 2924-1995
Photography still photography with color negative film
Determination of ISO speed
(ISO 5800. 1987, IDT)
Posted 2008-06-18
2009-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is identical with ISO 5800. 1987 "photography still photography with color negative film measurement ISO sensitivity."
This standard is equivalent translation ISO 5800. 1987.
For ease of use, this standard does the following editorial changes.
a) "this International Standard" be replaced by "this standard";
b) use a decimal point instead of a decimal comma ",". ",";
c) Delete ISO 5800. 1987 Foreword instead of the standard "foreword"; the introduction of international standards as a direct translation of this standard
introduction.
This standard replaces GB/T 2924-1995 "color photography, negative Determination of ISO speed."
This standard compared with GB/T 2924-1995, including the following changes.
--- Increasing the foreword and introduction;
--- Application to international standards ISO 5800. 1987 requirements, clear requirements of this standard does not apply to cinematographic color negative
Of the film (Excerpts Chapter 1, Chapter 1, 1995 edition);
--- Description of the exposed portion of the full use of international standards ISO 5800. 1987, and GB/T 2924-1995 referenced
GB/T 15061-1994 "General rule for determination of the photosensitive silver halide photographic material of the first section applies to incandescent tungsten and daylight exposure
Sample exposure conditions of light "in the relevant content (edition 53, 1995 Version 5.3.);
--- Densitometry removed on M state diffuse transmission density symbol mark, and the provisions of the minimum area measuring aperture (Excerpts
5.5, 5.5, 1995 edition).
The standard proposed by China Petroleum and Chemical Industry Association.
The photosensitive material standard by the National Standardization Technical Committee (SAC/TC102) centralized.
This standard was drafted. China Lucky Film Group Corporation.
The main drafters of this standard. Tang Zhijian, Cheng Yuan, ZHAO.
This standard replaces the standards previously issued as follows.
--- GB/T 2924-1995.
GB/T 2924-2008/ISO 5800. 1987
Introduction
Color negative film in a wide range of exposure, as long as at the time of enlargements adjusted accordingly, can often obtain a satisfactory picture. According to the present
When the standard assay negative film sensitivity, tolerance underexposed about a camera exposure value unit (camera aperture that is Ev). The exposure
Excessive tolerance can be as large as 3 Ev. In other words, if a color negative film sensitivity is ISO 100, ISO 12 to it in
ISO 200 under any conditions of exposure can be satisfied with the results.
Circumstances photographer generally tend to be underexposed, especially with a simple camera 1), shooting scenery in cloudy weather or when a large shadow
Body case. Some film cameras designed to make full use of color negative film through exposure latitude, the effect of improving the above case shot, with
Body approach is to let the sun over exposure conditions, in order to improve tolerance shoot underexposed. For example. in the 126 standard cartridge loaded film
The sensitivity of ISO 100, and ISO codes can be set to ISO 64.
This standard is GB/T 2924-1995 revised edition, updated written format, refer to the new relevant ISO standards, illuminant and density measurement
Amount to make a more accurate description of the amendments to this standard does not make any change in the value of sensitivity.
1) such as those with a shutter speed and aperture camera two tranches.
GB/T 2924-2008/ISO 5800. 1987
Photography still photography with color negative film
Determination of ISO speed
1 Scope
This standard specifies the method for determination of color negative film ISO sensitivity camera for still photography. These films obtained from color
Color negative film mainly for the production of a reflective color photographs, it can also be used to produce color transparencies. Application of this standard can be obtained in actual Sensitivity
When shooting for the exposure meter, exposure and exposure calculator table.
This standard does not apply to aerial photography and cinematography and production of intermediate negative with color negative film.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 11500 photographic density measurements - Part 2. Geometric conditions for transmission density (GB/T 11500-2008, ISO 5-2.
2001, IDT)
GB/T 11501 photographic density measurements - Part 3. Spectral conditions (GB/T 11501-2008, ISO 5-3.1995, IDT)
ISO 2720 Universal photography photographic exposure meter (photoelectric type) General Technical Requirements
ISO 7589 photosensitive measurement illuminant sunlight and incandescent tungsten light Technical Specifications
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
In a predetermined exposure, wash processing, density measurement and evaluation conditions, the quantitative calculation of the photographic material in response to light energy produced.
3.2
Illuminance on the film of the time points measured in lux seconds, marked by the symbol H. Log10H exposure often expressed in units.
3.3
Used to represent the amount of exposure by a factor of 2 to change the units, that is, changing the amount of exposure 0.30log10H units. According to ISO 2720 regulations, with
1Ev to represent.
Changing the exposure amount by changing the exposure time, the intensity of illumination on the lens or add filters to achieve.
4 sampling and storage
In determining the product ISO sensitivity is very important to assess the sample can produce an average effect obtained when the user uses. This requires
To periodically evaluate several different batches of the product under the conditions specified in this standard. Sample evaluation period should be stored under the conditions recommended by the manufacturer
Time, the average maturity of the product to simulate normal use. Rinse measuring instruments and equipment required film speed used in multiple independent evaluation,
Ensure it is accurate calibration. Selection and storage of the sample above the basic objective is to ensure that the resulting film was measured characteristic representative of the photographer in use
When the film properties obtained.
GB/T 2924-2008/ISO 5800. 1987
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