1. Vari-focal lens①
Easily changeable angle of view: 2.8 to 12mm
2. T↔W (Tele ↔ Wide)③
Turn this adjustment knob③ clockwise or counter-clockwise to set the focal length.
3. ∞↔N②
Turn this adjustment knob② clockwise or counter-clockwise to set the focus.
4. After setting the focus and focal length, the adjustment knob② and ③ should be
securely fastened.
5. Do not stamp your fingerprint on the lens and dome, which may affect picture quality.
HOW TO ADJUST ANGLE OF VIEW