Standardization of terminology, requirements and test methods for optical systems used for direct viewing distant objects. This includes monocular and binocular telescopic systems supported by hand or tripod, telescopic sights that are mounted on firearms and amateur astronomical telescopes. Telescopic systems containing integral light sources, displays and electronic detectors sensors, including amplifying detectors, image sensors and microprocessor control of these systems are included as well. Components and accessory devices used with these telescopic systems, such as eyepieces, tripods and light shields, as well as their interfaces are also included.

Standardization of terms and definitions pertaining to these optical systems and test methods to assess their optical performance (including user comfort and ergonomics) as well as their performance under varying environmental conditions.

Excluded are video cameras used for recording distant objects and surveying instruments.

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Sustainable Development Goals

This committee contributes with 25 standards to the following Sustainable Development Goal:


Published ISO standards *


ISO standards under development *

Participating members
Observing members

* number includes updates

Reference Title Type
ISO/TC 172/SC 4/WG 2   Telescopic devices Working group
Liaison Committees to ISO/TC 172/SC 4

The committees below can access the documents of ISO/TC 172/SC 4:

Reference Title ISO/IEC
ISO/TC 172/SC 9 Laser and electro-optical systems ISO


Liaison Committees from ISO/TC 172/SC 4

ISO/TC 172/SC 4 can access the documents of the committees below:

Reference Title ISO/IEC
ISO/TC 172/SC 9 Laser and electro-optical systems ISO

ISO/TC 172/SC 4 - Secretariat

DIN [Germany]

DIN Deutsches Institut für Normung e.V.
Am DIN-Platz, Burggrafenstraße 6
D-10787 Berlin

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