其右边的为标准色颜色，光学目镜具有光线调节和调焦能力，使用方便。

The right for the standard color, optical eyepiece with light regulation and focusing ability, easy to use.

youdao

其右边的为标准色颜色，光学目镜具有光线调节和调焦能力，使用方便。

The right for the standard color, optical eyepiece with light regulation and focusing ability, easy to use.

youdao