标准摘要
[中文适用范围]： 规定了镜头前组的标准直径系列及同一前组的标准螺纹尺寸系列。该数据适用于照相机、放大机及类似设备用镜头，旨在简化旋入式滤镜等附件的生产与存储。 [外文原描述]： Specifies a standard series of diameter sizes for the front part of a lens barrel and a standard series of thread sizes for the same front barrel. The data are applicable to lenses of cameras, enlargers and similar equipment. They are meant to simplify the production and storage of such auxiliaries as screw-in filters.
英文名称Photography — Front lens barrels up to 127 mm — Dimensions important to the connection of auxiliaries