Be careful:

1. Please pay attention to the site environment during replacement. It is recommended to dismantle it and replace it in offices and other places with better environment

2. The focus convex face is downward (i.e. towards the protective mirror after installation)

安装图示

Steps:

1. Remove the four screws of the focusing cap

2. Screw a screw onto the focusing lens base to take out the focusing lens base

3. Rotate the pressure ring and take it out

4. Replace the focusing lens (the convex surface faces down, i.e. towards the protective mirror after installation)

5. Put back the focusing lens base and install the cap (anti stupidity design, inserted reversely and not in place)