When I bought CCTV, the price changed a lot depending on mm among the types, what does & nbsp;mm mean?
351 5 7 years ago
pu1. If mm is large, you can see the video narrow and close, and if mm is small, you can see the video far and wide
2017-11-23
pu2. Depending on the purpose, it can be considered wide-angle (~45mm), standard (6~10mm), and telephoto (12~16mm)
2017-11-23
pu3. It means the angle of view, and depending on the region, the type of view is determined, but the angle of view varies depending on the sensor used
2017-11-23
pu4. 3~4mm wide-angle lens: wide-range monitoring
6-8 mm standard lens: cash counter, bank, etc
12~16mm Telephoto lens: Detailed monitoring of vehicle license plate, front of safe, etc
HD-class CCTV, manual zoom lens: wide range, narrow range
2017-11-23
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