What is the angle, blind spot and distance of the lens (2.8 mm, 3.6 mm, 6 mm, 8 mm ...)?

2.8mm？ ≤5 meters? Shooting angle? 96.4 86.2 8 1.9 72.9 ?

3.6mm？ ≤ 5 15m shooting angle? 75.7 66 62.2 54.3

6mm ≤ 525m？ The shooting angle is 50 42.6 39.8 34.2?

8mm？ ≤530 meters? The shooting angle is 38.5 32.6 30.4 26 1.

Surveillance camera is a quasi-camera used for security. Its pixel and resolution are higher than computer video head, but lower than professional digital camera or dv.

Most surveillance cameras are just a single video acquisition device, and there are few data storage functions.

Surveillance cameras are mainly divided into gun type, hemispherical type and high-speed spherical type in appearance. There are also differences between analog monitoring and IP network monitoring, which are widely used in security fields such as schools, companies, banks, transportation and safe cities.