[New Standard] Bs Iso 20711: 2017 - Optics And Photonics - Environmental Requirements - Test Requirements For Telescopic Systems

This standard specifies requirements to be met with regard to resistance of the optical, mechanical, chemical and electrical properties or performance data of instruments to environmental influences and hence determines geographical and technical areas of application. It applies to consumer telescopic systems and accessories, such as hunting and sporting products. The standard can be purchased and downloaded directly from BSI, price £116.00