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The accurate calculation formula of the focal length and the actual distance of the lens are monitored
- Therefore, when it is necessary to monitor the panorama to see the local, it is generally considered that the electric two variable or electric three-variable lens should be considered. Of course, using high resolution cameras and monitors can also see the local details of the objects being monitored for an hour when the camera is selecteds
What's the difference between a 6mm camera and a 3mm camera
- 3. The smaller the lens, the closer it is to monitor the distance, and the larger the lens is, the more effective it is to monitor the distance.s
My surveillance camera is not video in the evening, what is the matter?
- Your monitor should be infrared. If there is an image during the day, there is no image at night, it may be that the red light will be opened at night and the power supply will be larger than that of the day. But you don't have enough power. Maybe that's the reason.s
What does the ministry of public security (MPS) refer to the video surveillance of A lens, type B lens, and c-type lens?
- -- A kind of lens division principle. Class A lens means the key units, key areas and important sections involved in national security, the key parts of the national economy and people's livelihood and public safety planning are video camera, such as the main entrances and exits of the party and government authorities at or above the district and its surrounding people easily gathered area; Main access channels and operating halls of telecommunications, postal services and finance; The reservoir and important machine room of the city water supply enterprise; To develop, produce, sell and store inflammable and explosive parts of dangerous goods units; Import and export of important pedestrian streets and squares to the central area; Major trade and cultural centers of the region; Highway, national trunk road vehicle import and export, entry and exit area of the main entrance, urban road people traffic large section of road.s
Hello, how about the camera lens
- This time can see the lens, lens and the base is to use a small screws, put the small screws removed, rotating lens, lens and the base is through the lens of thread fixed, the 6 MM lens removed, install 3.6 MM lens.s
Monitor the problem I see other people in the monitoring of a video line 4 shots how do you do it?
- The main device for the transmission of multiple camera signals on the Internet is that the transmitter has a corresponding dialing code similar to that of a cloud deck decoders
Panoramic camera monitoring distance is how many meters?
- Lens is divided into a lot of kinds, common is 3.6 MM 6 MM to 8 MM, 12 MM, the closer distance with the smaller values of the lens, is the smaller the value, see clearly, because the personage inside course of study will be 3.6 MM wide Angle lens as large lens. The longer the distance the relative lens for example: the greater the value in monitoring scope of 50 meters, then apply 3.6 MM lens, if you use 8 MM lens, then you see the picture will be relatively far from the camera, the scope of monitoring can't satisfy the monitoring scope of 50 meters needs. [Ann as treasure 】 the camera.s
About installation monitoring, how to monitor the number of meters according to the range and distance?
- It's easy to get rid of the corner. Opposite to install a probe basically no dead ends. Followed by monitoring the lens depends on the site light is better, otherwise the image is not clear nor useful.s
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