HIKVISION DS-2CD2955FWD-I Quick Start Manual page 22

Network Fisheye Camera·Quick Start Guide
Bayonet Joint
5. To disassemble the camera: Press the Push button on the base
plate, rotate the camera anticlockwise, and then you can remove
the camera from the base plate.
Install the Camera
Disassemble the Camera
21
Wall
Base Plate
Bayonet Joint
Bayonet Joint
Camera