Compare NDF821 with NDF831 (2)
| Contact manufacturer | Contact manufacturer | |
| Chip Inch Size |
1/3
|
1/3
|
| Colour Type |
Colour
|
Colour
|
| Sensitivity lux |
0.1
|
0.5
|
| Voltage |
24 V AC, 12 V DC
|
12V DC / 24 V AC, PoE
|
| Focal length |
4
|
3 ~ 9
|
| Compression |
H.264, MPEG4, Motion JPEG
|
M-JPEG, JPEG, MPEG-4
|
| Back Light Compensation |
✔
|
✔
|
| Auto Gain Control |
✔
|
✔
|
| White Balance |
✔
|
✔
|
| Electronic Shutter range |
1/10000 ~ 1/3.75
|
1/30; Support long shutter 1/7.5~4
|
| Synchronisation |
Internal
|
Internal
|
| Signal Mode |
PAL/NTSC
|
PAL/NTSC
|
| Resolution TVL |
--
|
1280x 960
|
| Pan Speed o/ sec |
--
|
350
|
| Digital (DSP) |
--
|
✔
|
| Tilt Speed o/ sec |
--
|
150
|
| Indoor/Outdoor |
--
|
Indoor/Outdoor
|
| Rotation Angleso |
--
|
31.8 ~ 90 (H) x 23.9 ~ 66.2
|
| Built-in IR LED |
--
|
✔
|
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