Security surveillance camera lens knowledge and how to choose

Monitoring the lens of the network camera is a relatively important device of the monitoring system. On the one hand, its quality can affect the parameters of the entire camera, and on the other hand, whether its matching is appropriate is directly related to the overall effect of the monitoring system.

Usually go to the situation, the camera lens does not need to be adjusted by ourselves, we can choose 4mm, 6mm or 8mm lens when we choose. Let's take a look at the common sense of network camera lenses and how many millimeters to choose.

Nowadays, the megapixel lens of the network camera has 1 million pixels, 1.3 million pixels, 2 million pixels, 3 million pixels, and 5 million pixels. Some high-end manufacturers have done 10 million pixels. Our usual users can use pixels up to 2 million, and several aspects that determine the clarity of the lens include:

Monitor the material and purity of the lens: the material has less impurities and higher purity, so from the optical point of view, less interference light is generated.

Monitoring the precision of the lens grinding: This precision is determined by mechanical grinding equipment. The difference between domestic lens and foreign big brand lens is at this point.

Monitoring the precision of the coating of the lens: The coating process is an important process for monitoring the manufacture of the lens. The accurate control of the coating is also one of the determining factors of the lens definition.

When we choose, we should choose the lens products that match the function according to the application range of the camera. If the network camera needs to be equipped with an infrared fill light during use, you need to choose an IR-enabled lens, so that you can get a brighter and brighter picture even at night.

In addition, when the lens is selected, it is necessary to pay attention to the place to be used. What kind of lens is needed, and what kind of lens is selected.

The general lens size is most closely related to the monitoring angle and monitoring distance. For details, refer to the lens matching table below.

Through the above table, we can see the relationship of these parameters, the following is a schematic diagram of the choice of the lens.

I hope that everyone will be more comfortable when choosing and feel that it is useful for you to collect and forward.