Note For Adjusting Focus And Zoom - GeoVision GV-IPCAM User Manual

Note for Adjusting Focus and
Zoom
When adjusting the Focus and Zoom Screws (on Box Camera, IR Arctic
Box Camera, Bullet Camera, Vandal Proof IP Dome and Fixed IP
Camera), please do not over tighten the Focus and Zoom screws. The
screws only need to be as tight as your finger can do it; don't bother
using any tools to get them tighter. Doing so can damage the structure
of lens.
For example,
Bullet Camera
The maximum torque value for all the zoom and focus screws is 0.049
N.m
Zoom Screw
Focus Screw
Focus Screw
Zoom Screw
Fixed IP Camera
XXI