What is the scope of the surveillance camera?

Surveillance cameras, network cameras have pixels, resolution, wireless and other characteristics, a lot of friends in the choose and buy surveillance cameras, network cameras have focused on these problems, so many to choose and buy of surveillance cameras network cameras can well meet the requirements of their own household, surveillance cameras, network cameras monitoring scope, do you know?

General surveillance camera 3.6-6 mm network camera is generally within 40 meters of the copy, belongs to the indoor machine and door dedicated to belong to the wide Angle lens.

6 mm to 100 on the narrow Angle lens, the general effective distance is about 100 meters. The degree of

And some of the 25 millimeter ones are about 150 meters.

If you use high-speed laser turntable all-in-one machine can reach an infrared distance of 300 meters, but this model costs a lot, about 13,000 yuan, and the commonly used lens is generally Angle as follows:

2.8 mm 101 ° to answer

3.6 mm 83 °

4 mm 76 °

53 ° 6 mm

35 ° 8 mm

12 mm 28 °

16 mm 21 °

13 ° 25 mm

The Angle difference between 1/3CCD and 1/4 CCD is about 20° -