Security Surveillance Camera Systems
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Hello, how about the camera lens
- After the debugging is clear, put on the red outer panel, install the shell, install to the appropriate position. If it is a hemispheric camera, some need to be installed in the right place to install the shell.s
The monitoring camera has 3.6 mm and 3.2 mm. What is the difference?
- See range is different, 3.6 MM to look wide a fews
The filters on the monitor are 650,850,940. What do they do respectively? What's the difference?
- This is the infrared filter, the number is the wavelength, the longer the wavelength, the less visible the eye, 650 is the red light visible part + the infrared parts
Monitor the camera lens 1/3/1/4, and so what is the meaning of what relationship with the millimeter
- These units are inch is the size of the chip, 1/2 inch 1/3 larger than 1/4 large, the same size lens 1/2 1/3 according to the angle of 3.6 mm lens angle of 1 / 1/3 is more than 70 degrees then 1/4 inch is more than 60 ° 6 mm lens 1/2 inch angle of about 60 degrees 1/3 inch 50 ° about 1/4 inch 40 degrees ~!s
How does the camera lens's focal length choose?
- 4, in the city for security monitoring camera lens, due to monitoring the distance and the environment is different from the basic configuration of 10mm to 120mm or so long-range zoom lens can be.s
What does it mean to monitor the focal length in the camera?
- Surveillance cameras are a lot of sellers don't understand the concept of focal length, they tell you that the lens is a few millimeters, this is a few mm focal length or the lens diameter they all don't understand, they only know to see far or near.s
What is the focal length of the camera lens in the elevator
- The elevator lens is generally used in wide-angle lens, and the commonly used wide-angle lens is 2.8 mm and 3.6 mms
Monitor knowledge! How much Angle camera is best for the 1.2m x 20 m?
- Corridor is 20 meters if single export with a camera is ok, if there are multiple export requires added, hemisphere and the bolt can be, the lens Angle, need to look at how far, with 3.6 MM lens to see 3 m is the best effect, wide Angle lens are can cover the range of 1.2 meters, advice or 4 MM 6 MM lens, distance see 6-10 m works best, covering in 50 ° to 60 °s
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