注意：
be careful:
1.更换时请注意现场环境，建议拆掉在办公室等相对环境较好的地方更换
Please pay attention to the on-site environment during replacement. It is recommended to remove it and replace it in a relatively good environment such as the office
2.安装时轻拿轻放，注意安装时的水平放置
Handle with care during installation, and pay attention to the horizontal placement during installation
3.务必清理枪体外部
Be sure to clean the exterior of the gun body
4.务必确认镜片的规格
4. Be sure to check the lens specifications
准直镜片的安装
聚焦镜片的安装
（图示中使用的为F200/F400镜片，因此需要一个垫圈，常规型号不需要）
(The F200/F400 lens used in the illustration requires a gasket, which is not required for conventional models.)
反射镜片的安装
原厂镜片带支架一体，方便更换，请勿自行使用胶水粘镜片
The original lens is integrated with a bracket for easy replacement. Do not use glue to glue the lens yourself