GB/T 9917.2-2008Camera iens - Part 2: Fixed focus iens (English PDF)

Foreword

GB/T 9917 "taking lens" is divided into several parts.

--- Part 1. zoom lens;

--- Part 2. fixed focal length lens;

This section GB/T 29917 Part of, instead of GB/T 9917-1988 "camera lens" in the fixed-focus lens part.

Section compared with GB/T 9917-1988 The main changes are as follows.

--- Frame size of 60mm × 60mm fixed focal length lens to use as a reference (first paragraph of the 1988 edition, Tables 3 and 6; Excerpts Chapter 1, paragraph 2);

--- Change the focal length of the demarcation zone (Table 4 1988 edition, this edition of Tables 2 to 5);

--- Quality characteristics into a unified index level (see 4.3 and Chapter 5) five;

--- Quality characteristics and quality indicators according to the focal length of segment classification to be broken down (see Chapter 5);

--- Field division to harmonization;

--- Edge of the field increased the camera resolution of 0.85 y 'with the field of view requirements (1988 version 2.4.4, this version of Table 1);

--- Increased reliability of early functional failure (see 5.11 and 6.11);

--- Remove the modulation transfer coefficient (1988 Version 2.8 and 3.8);

--- Increasing the classification and specification code, inspection rules, instructions for use, packaging, transportation and storage (see Chapter 4, Chapter 7, Chapters 8 Chapter 9).

1 Scope

This section GB/T 9917 specifies the fixed focal length lens and naming classification, requirements, test methods, inspection rules, instructions for use, package Equipment, transportation and storage.

This section applies to the frame size of 24mm × 36mm fixed focal length of the photographic lens (hereinafter referred to as the lens). Non-frame size 24mm × 36mm fixed focal length lens can refer to use.

2 Normative references

The following documents contain provisions which, through reference to GB/T 9917 to the present, constitute provisions of this section. For dated references Documents, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Research into whether the parties to the agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

GB/T 9917.1-2002 photographic lenses - Part 1. zoom

GB/T 13964 Photographic Machinery terminology

JB/T 7473-1994 photographic lens resolution test chart

Measurement JB/T 8248.2 photographic lens effective aperture and relative aperture

JB/T 8248.3 photographic lens vignetting and image uniformity coefficient surface illuminance measurements

JB/T 8248.4 photography lens flare coefficient measurement method

JB/T 8248.5 photographic lens focal length measurement

JB/T 8248.6 Determination of the photographic lens camera resolution

3 Terms, definitions and symbols