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JB/T 8621-2014Enlarging lenses (English PDF)

放大镜头

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

May 6, 2014

Implementation date

October 1, 2014

Scope

JB/T 8621-2014 is the English-translated version of 放大镜头.

It is written for enlarger lenses and for the lenses of colour photographic processing machines, and it is classified N43 in the Chinese scheme and 37.040.10 internationally, the field of photographic equipment.

GB/T 9917.1-2002 and GB/T 9917.2 are quoted, together with JB/T 7799-2014, JB/T 8251, JB/T 10069 and several parts of the JB/T 8248 series. It replaces JB/T 8621-1997. Issued on 6 May 2014, it has applied since 1 October 2014.

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Document preview — JB/T 8621-2014

National Standard of the People's Republic of China

ICS: 37.040.10
Replacing: JB/T 8621-1997

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

1 Foreword

JB/T 8621-2014 was issued by Ministry of Industry and Information Technology of the People's Republic of China on 6 May 2014 and has been in force since 1 October 2014.

It replaces the earlier edition JB/T 8621-1997.

2 Scope

Enlarging lenses fall under JB/T 8621-2014, a recommended standard of the Chinese machinery industry. The document states the common technical requirements for the lens, the test methods used to verify them and the marking to be applied. It is written for enlarger lenses and for the lenses of colour photographic processing machines, and it is classified N43 in the Chinese scheme and 37.040.10 internationally, the field of photographic equipment. GB/T 9917.1-2002 and GB/T 9917.2 are quoted, together with JB/T 7799-2014, JB/T 8251, JB/T 10069 and several parts of the JB/T 8248 series. It replaces JB/T 8621-1997.

3 Normative references

JB/T 8621-2014 cites the following standards, which apply in full or in part through the references made to them in its clauses.

GB/T 9917.1-2002

GB/T 9917.2

JB/T 7799-2014 — Resolution test strips for lenses of colour photo printers

JB/T 8248.2

JB/T 8248.3

JB/T 8248.4

JB/T 8248.5

JB/T 8248.7

JB/T 8251

JB/T 10069

4 About this standard

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

English translation: about 15 pages

5 Related standards

Other editions:

JB/T 8621-1997 (earlier edition)

6 Classification and status

International classification (ICS): 37.040.10

Prefix JB/T: recommended standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

JB/T 8248.7

Editions of JB/T 8621

Edition	Title	Revision	Status
JB/T 8621-2014	Enlarging lenses	current edition	Current
JB/T 8621-1997	Enlarging lenses	previous edition	Superseded

This page sells the current edition, JB/T 8621-2014. Earlier editions are listed for reference only.

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