JB/T 8247.2-1999
照相镜头 光圈标记
Aperture markings of photographic lenses
1999-08-06
KS B 5425(2018 Confirm)
사진 렌즈의 조리개 눈금
照相镜头？F号标记
2013-12-31
JB/T 8247.1-1999
照相镜头 摄影距离刻度标记
Photographic distance scale markings of photographic lenses
1999-08-06
BS ISO 517-2008
Photography. Apertures and related properties pertaining to photographic lenses. Designations and measurements
照相术与摄影镜头有关的光圈和相关特性 名称和测量
2008-06-30