1- 4mm Wide Angle Lens cctv 92 degrees For Foscam the fi8919w Network Camera 

The stock lens is only 60 degrees FOV so you get to see so much more with our lens & at high quality.

To change the lens,  just remove the dome casing cover which is held in with 4 hex screws.

Then thread out the lens which may be secured by a small set screw on the side of the lens that needs to be loosened.

Then thread in the new lens while focusing it in live view mode.