Traditional Culture Encyclopedia - Photography major - What parameters should I pay attention to when purchasing surveillance cameras?
What parameters should I pay attention to when purchasing surveillance cameras?
At present, CCD mainly includes Sony, Panasonic and Sharp. Of course, Sony is the best, Panasonic is the second and Sharp is the worst.
The price difference is also great. The CCD is also divided into 1/2 inch, 1/3 inch, 1/4 inch, 1/2 inch, which is the most expensive.
Second, you need to know the definition of a camera. Generally, the camera is on the 420 480 520 570TV line.
However, the actual resolution is lower than 100, and the minimum illumination of the camera is 0. 1LUX. You also need to know the luminous flux of the camera, which is generally at F 1.2 F 1.4. .....
Thirdly, if you choose an integrated infrared camera, you should know where the infrared light of the infrared camera is made. Generally can be reflected in the price. Rotten infrared lamps have short life and high consumption.
Fourthly, if you choose an ordinary bolt machine, the lens is also an important part. You should know the millimeter of the focal length of the lens. The smaller the f value of the aperture, the better the quality and technology of the lens can be reflected. One thing, fixed-focus lenses include manual zoom, automatic aperture, manual zoom and manual aperture, electric zoom and electric aperture, automatic aperture and manual aperture.
Yanhuang video, what I said about infrared light attenuation is well-founded. I come from Taiwan Province Liling (China) Electronics Co., Ltd., a company specializing in the production and development of monitoring equipment. Liling has a history of 20 years, and everyone who does security knows it. The best infrared lamp on the market now is nothing more than American piranha. The power of ordinary infrared lamp will be reduced by 20% if it is used continuously for 3 months. A year later, the effect will be worse at night.
At one time, you said that you must have an infrared light when using a gun, which proved that you were unprofessional. At present, the illumination of color-to-black camera using IR/CUT technology can reach 0.0 1LUX, and the starlight illumination is not high, and the detection accumulation of YC separation camera can reach 0.00 1LUX day and night. Use infrared light only in complete darkness. Not necessarily.
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