In general the security monitoring system installation, installation and debugging method definition network cameras and ordinary cameras basically the same, but we must pay attention to good lens optional, because the poor quality of the lens, or a bad option, will largely affect the clarity of the screen;

Such as infrared night vision camera system best selection of infrared camera, and 1/3 inch CCD generally equipped with 1/3 inch lens, 1/2-inch CCD generally equipped with 1/2 inch lens, focusing lens installation commissioning must be adjusted, particularly in the back focal plane of the camera to be aligned, often focusing lens can cause blurring of the image is unclear, reach high-definition requirements.