Zoom / Focus Adjustment by Gear Mechanism
Most of IR dome cameras apply belt in the internal Mechanism (to transmit focus to position lens). The performance of belt is easily affected by high or low temperature. This will easily cause idling and make the lens not easy to focus. Belt wear will also result in losing focus.
However we apply a gear mechanism in this Dome Camera to assure high precision and better focus of lens.
Double Ring Design
To avoid IR reflection from IR LED onto CCD. Camera can get a better image under night mode.