My brother just bought the above camera - fixed 2.8mm lens. Surprisingly bad picture once you get about 7-8m away. Good up close. Would have expected much better from 6MP. My 2MP cameras have better picture at distance. I thought that it could perhaps be improved by focusing but these seem to have a fixed focus - is this correct?
HI
@Gilera
Wide angle FOV quickly dilutes the pixel density.
Below are the Dahua specs on this camera. Note their calculated Identify is 7m. Dahua is typically more generous than we are on this. ( we like to use 100 ppf - pixels per foot when calculating ID distance )
IPC-HDBW4631E-ASE
6MP IR Mini Dome Network Camera
> 1/2.9” 6Megapixel progressive scan STARVIS™ CMOS
> H.265&H.264 triple-stream encoding
> 20fps@6MP(3072x2048), 25/30fps@4MP(2688x1520)
> Smart Detection supported
> WDR(120dB), Day/Night(ICR), 3DNR,AWB,AGC,BLC
> Multiple network monitoring: Web viewer, CMS(DSS/PSS) & DMSS
> 2.8mm fixed lens (3.6mm optional)
> 1/1 Alarm in/out, 1/1 audio in/out
> Max. IR LEDs Length 30m
> Micro SD memory, IP67, IK10, PoE
Lens Type: Fixed
Focal Length: 2.8mm (3.6mm)
Max. Aperture: F1.6 (F1.6)
Angle of View: H:
98° (69°), V: 67° (48°)
Close Focus Distance
0.9m (1.7m)
DORI Distance
Lens || Detect | Observe | Recognize |
Identify
2.8 mm || 69m(226ft) | 28m(92ft) | 14m(46ft) |
7m(23ft)