ISO 14135-2:2021 Optics and photonics — Specifications for telescopic sights —Part 2: High-performance instruments

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Optics and photonics — Specifications for telescopic sights —Part 2: High-performance instruments
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Optics and photonics — Specifications for telescopic sights —

Part 2: High-performance instruments

1 Scope

This document applies to high-performance telescopic sights, used on hand-held firearms and airguns. It contains a classification of the usage of telescopic sights and specifies interfaces, minimum requirements and tolerances to their performances.

General-purpose telescopic sights are specified in ISO 14135-1.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 14132-1, Optics and photonics — Vocabulary for telescopic systems — Part 1: General terms and alphabetical indexes of terms in ISO 14132

ISO 14132-3, Optics and photonics — Vocabulary for telescopic systems — Part 3: Terms for telescopic sights

ISO 14490-1, Optics and optical instruments — Test methods for telescopic systems — Part 1: Test methods for basic characteristics

ISO 14490-3, Optics and photonics — Test methods for telescopic systems — Part 3: Test methods for telescopic sights

ISO 14490-5, Optics and photonics — Test methods for telescopic systems — Part 5: Test methods for transmittance

ISO 14490-7, Optics and photonics — Test methods for telescopic systems — Part 7: Test methods for limit of resolution

ISO 20711, Optics and photonics — Environmental requirements — Test requirements for telescopic systems

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 14132-1 and ISO 14132-3 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso. org/o bp

— IEC Electropedia: available at http:// www .electropedia .org/

ISO 14135-2:2021(E)

4 Classification

Due to different requirements, telescopic sights shall be classified according to their end use, thus:

— telescopic sights for airguns;

— telescopic sights for pistols (e.g. handgun scopes);

— telescopic sights for rifles (e.g. hunting telescopic sights).

5 Interfaces

Telescopic sights shall have interfaces to mounting systems for interconnection with firearms.

The interface areas shall be the central tube and, if of different size, the objective tube.

The interface areas shall be cylindrical in shape. Alternatively, the central tube may have a dovetail at the bottom side.

Recommended interface dimensions are shown in Annex A.

For interface areas, see Figure 1.

Key

1 objective tube

2 central tube

D diameter of objective tube

o

D diameter of central tube

c

Figure 1 — Interface areas (schematic)

6 Fundamental requirements

Fundamental requirements are defined by minimum values or tolerances for the important characteristics of telescopic sights.

Tolerances specify maximum deviations between measured and nominal values. Nominal values shall be laid down by the manufacturing or trading company.

Telescopic sights shall conform to the environmental requirements relative to the respective instrument type as appropriate. These environmental requirements shall be specified in ISO 20711.

Conformity of the telescopic sight with the requirements given in Table 1 and Table 2 shall be tested in accordance with the test methods specified in ISO 14490-1, ISO 14490-3, ISO 14490-5 and ISO 14490-7.

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