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Comparison Dahua DH-HAC-HUM1220GP-B vs Dahua DH-HAC-HUM1220GP

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Dahua DH-HAC-HUM1220GP-B
Dahua DH-HAC-HUM1220GP
Dahua DH-HAC-HUM1220GP-BDahua DH-HAC-HUM1220GP
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Mountoutdooroutdoor
Body typehiddenhidden
Connection
BNC
BNC
Camera features
Design and features
light sensor
light sensor
Matrix
Matrix typeCMOSCMOS
Matrix size1/2.9"1/2.9"
Number of megapixels2 MP2 MP
Video resolution1920x1080 px1920x1080 px
Frame rate25 fps25 fps
Minimum illumination0.02 lux0.02 lux
Aperturef/2.0f/2.0
Signal to noise ratio65 dB
Backlight compensationDWDR+BLCDWDR+BLC
Lens
Focal typepermanentpermanent
Focal length2.8 mm2.8 mm
Horizontal viewing angle109.4 °109.4 °
General
Power source
12 В /maximum consumption — 0.6 W/
12 В /maximum consumption — 0.6 W/
Operating temperature-40 °C ~ +60 °С-40 °C ~ +60 °С
Maximum humidity90 %90 %
Protection levelIP67IP67
Materialmetalmetal
Dimensions110.1x50x47.4 mm30x30x68.2 mm
Weight100 g70 g
Color
Added to E-Catalogmay 2018may 2018

Signal to noise ratio

The signal-to-noise ratio that the surveillance camera corresponds to.

This indicator describes the ratio of the level of the useful signal (the actual image produced by the camera to an external device) to the level of extraneous noise that inevitably arises during the operation of electronic circuits. Such noise appears in the image as characteristic noise (“snow”). The higher the signal-to-noise ratio, the less interference on the screen, the clearer and better the image is, and the smaller the volume of recorded video files. It is believed that visible noise practically disappears at a ratio of at least 45 dB. However, among modern cameras there are also higher rates.
Dahua DH-HAC-HUM1220GP-B often compared