Note For Adjusting Focus And Zoom - GeoVision GV-VD120D Quick Start Manual

Note for Adjusting Focus and Zoom

When adjusting the Focus and Zoom Screws, do not over tighten the
Focus and Zoom screws. The screws only need to be as tight as your
finger can do it. It is not necessary to use any tools to get them tighter.
Doing so can damage the structure of lens.
The maximum torque value for all the zoom and focus screws is 0.049 N.m
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