Q:20 meters away with the number of mm monitor camera lens appropriate?

1/4 "CCD lens in the line of sight with 1/3" CCD no difference, but the angle will be more narrow, while the shooting of the object will appear taller.

Q:Monitor the difference between the camera 720p and 1200 lines

720P is 1280 X 720 pixels short, usually also known as 100W like. Is a parameter of the clarity of the digital camera system.

Q:Does the surveillance camera itself have a record storage function?

But there is a class called the camcorder camera itself with a storage function, you can play through the menu video playback

Q:What is the maximum visual range of a video surveillance camera?

And the lens, light board angle, detailed advice Jinrui as surveillance cameras

Q:Ready to engage in a facade ... to help people engage in monitoring. General how much of this type of profit. How to charge.

The current monitoring market is chaotic, the brand is more, at the same time, is also based on the current market demand is growing, relative to the three-tier cities in terms of profit margins can also be generally about 30% of profits, which refers to equipment sales, But do the project said, do relationship, you can control the profit margin, how much the general decision. Fees are not fixed, the construction fee is generally added in the profit after the total equipment to take 10% -15%.

Q:Monitor the farthest distance from the camera can be far, which manufacturers out

Commonly used fixed lens camera lens focal length specifications are 4mm, 6mm, 8mm, 16mm, 25mm, viewing angle were about 80 degrees, 65 degrees, 50 degrees, 30 degrees, 15 degrees, the effective distance of 10 meters, 20 meters, 30 meters, 40 meters, 50 meters.

Q:Is the camera pixel taller the better?

But because of the current network bandwidth limitations, really very high physical pixels in the video screen may be cards, depending on your network. Now most of the camera on the market is 30W physical pixels, said hundreds of millions are blowing, a few can reach 130W physical pixels, but expensive, Logitech is currently the highest pixel is only 200W, so 800W, 500W those are Is interpolated, there is no practical significance.

Q:What is the effective range of infrared surveillance cameras?

Infrared probe about 3 meters to 12 meters between ~ ~ some special except to see the main object of the strong degree of reflex is not strong.

Q:Camera gun 4MM, 6MM refers to what?

Camera gun parameters in the 4MM, 6MM, etc. refers to the camera is configured lens focal length.

Q:HD camera is said that his clarity, infrared camera is that it's night vision function, in order to highlight the main features of the name of a

Monitoring If the surveillance camera is not able to complete the monitoring of the work, it needs to use other auxiliary tools to complete the entire monitoring process, which led to today's theme - PTZ