How does the camera lens's focal length choose?

Answer:

3, the general intersection monitoring, because the shooting space is larger, higher clarity requirements, so for 6mm to 60mm in the distance from the focal length lens.

5, the application of highways, national roads, rivers, airports, forests and other areas of large areas of monitoring needs in the above-mentioned environment, the monitoring range is far from the main features of these environments, so the general matching 10mm to 1100mm lens To meet the shooting needs.

4, in the city for security monitoring camera lens, due to monitoring the distance and the environment is different from the basic configuration of 10mm to 120mm or so long-range zoom lens can be.

2, for the district's security monitoring, or ordinary road monitoring, 6mm to 15mm monitoring lens is basically able to meet the demand.

1, under normal circumstances, the general conference room, office, elevator monitoring environment, 3mm to 12mm or so short-range focus lens to meet the demand.