Telescopes - photometric parameters for observation telescopes and telescopic sights - part 1 : determination of veiling glare 望远镜.观察望远镜和望远镜描准具的光度参数.第1部分
2.
Telescopes - photometric parameters for observation telescopes and telescopic sights - part 2 : determination of spectral transmission 望远镜.观察望远镜和望远镜描准具的光度参数.第2部分