What is ISO 14135‑2 about?
ISO 14135 is an International Standard on optics and photonics.
ISO 14135‑2 is the second part of the multi-series of documents which specifies classification to the usage of high- performance telescopic sights and interfaces along with tolerances to their performances. 
ISO 14135‑2 specifies minimum requirements to high- performance telescopic sights used on hand-held firearms and air guns and recommends dimensions of its interface.
Who is ISO 14135‑2 for?
ISO 14135‑2 on high-performance telescopic sights applies to:
- Manufacturers of telescopic sights
- Manufacturers of arms and weaponry
- Manufacturers of airguns and hand-held firearms
Why should you use ISO 14135‑2 ?
High- performance telescopic sights used on hand-held firearms and air guns require specific dimensions for its interface along with minimum requirements for its performance.
Different classifications mentioned in ISO 141352 helps you in finding whether these high-performance telescopic sights can be used in your arms product and help you in enhancement of your arms product.
Various interfaces mentioned in ISO 141352 help you in choosing right dimensions for your interface preventing any wastage due to wrong dimensions of your telescopic system.
Overall, ISO 141352 help the user in building a high-quality product that offer precision, accuracy for optimal performance and avoid product failure and damages.
What’s changed since the last update?
BS ISO 14135‑2:2021 supersedes BS ISO 14135‑2:2017 which is withdrawn. The main change is:
- Addition of critical eye relief to product information
