This part of ISO 14490 specifies the test methods for the determination of the veiling glare index of telescopic systems and observational telescopic instruments.
BS ISO 14490-6:2005 history
2014BS ISO 14490-6:2014 Optics and photonics. Test methods for telescopic systems. Test methods for veiling glare index
2005BS ISO 14490-6:2005 Optics and optical instruments - Test methods for telescopic systems - Test methods for veiling glare index