This part of ISO 14490 specifies the test methods for the determination of the transmittance of telescopic systems and observational telescopic instruments.
BS ISO 14490-5:2006 history
2021BS ISO 14490-5:2021 Optics and photonics. Test methods for telescopic systems. Test methods for transmittance
2015BS ISO 14490-5:2005+A1:2015 Optics and optical instruments. Test methods for telescopic systems-Test methods for transmittance
2006BS ISO 14490-5:2006 Optics and optical instruments - Test methods for telescopic systems - Test methods for transmittance