JB/T 9426.4-2011Lenses for motion picture camera - Part 4: Bayonet lens mount (type I) for 35mm motion picture camera lens (English PDF)

1 Foreword

JB/T 9426.4-2011 was issued by MIIT on 20 December 2011 and has been in force since 1 April 2012.

It is one of 6 parts of the JB/T 9426 series.

2 Scope

This standard is the fourth part of a recommended Chinese machinery industry standard on lenses for motion picture cameras, and its subject is the type I bayonet lens mount for the 35 mm camera lens. The part fixes the critical dimensions of the bayonet connection seat that are needed to meet optical and mechanical interchangeability. It applies to the 35 mm cinematography lenses specified in JB/T 9426.1, which is the standard it quotes, and the text refers to such a lens as the objective lens. The Chinese classification recorded for it is N43 and the international classification 37.060.10, and the issuing agency is the Ministry of Industry and Information Technology.

3 Normative references

JB/T 9426.4-2011 cites the following standards, which apply in full or in part through the references made to them in its clauses.

JB/T 9426.1

4 About this standard

Issued by: MIIT

English translation: about 15 pages

5 Related standards

Other parts of this standard:

JB/T 9426.1-2011 — Lens for motion picture camera - Part 1: Fixed focal length and zoom lens for motion picture camera

JB/T 9426.2-2011 — Lens for motion picture camera - Part 2: Series of motion picture camera Lenses

JB/T 9426.3-2011 — Part 3: Distance and aperture scale markings

JB/T 9426.5-2011 — Part 5: Threaded lens mount (type C) for 16mm motion picture camera lens

JB/T 9426.6-2011 — Motion picture camera lenses - Part 6: Methods for determining performance of motion picture camera lenses

6 Classification and status

International classification (ICS): 37.060.10

Prefix JB/T: recommended standard.