What's the difference between 4mm and 6mm cameras?

The differences between 4mm and 6mm cameras are: different vision, different monitoring distance, different definition and different application scope.

1, different horizons

4mm focal length and 79 field of view; The focal length is 6mm and the field of view angle is 49.

2. Different monitoring distances

4mm focal length, monitoring distance of about 6 meters; The focal length is 6mm, and the monitoring distance is about 10m.

3, the clarity is different

6mm focal length, see far, clear characters; The focal length of 4mm is very small, but it is very close and the characters are blurred.

4, the scope of application is different

Generally, small rooms, such as elevators, have a large field of vision, and you can choose a 4mm lens; For corridors, passages and other scenes with a small field of view that need to be seen far away, you can choose a lens of 6.

Camera structural assembly

1, lens

As the front-end component of network camera, lens has fixed aperture, automatic aperture, automatic zoom and automatic zoom, just like analog camera.

2. Image sensor

There are two modes of image sensor: CMOS and CCD. Generally, CCD image sensors are used to transmit devices with excellent image quality, while CMOS image sensors are selected for products that pay attention to power consumption and cost.

3. A/D converter

The function of A/D converter is to convert analog signals such as images and sounds into digital signals.

4. Web server

The network server provides the network function of the network camera. It adopts RTP/RTCP, UDP, HTTP, TCP/IP and other related network protocols, allowing users to access the network camera from their own PC with a standard browser according to the IP address of the network camera, watch real-time images, and control the lens and pan/tilt of the camera.