Unibrain Fire-i 580/780/785/980 Operation Manual Page 27
3.10. Shutter
Shutter is defined as the integration time of the incoming light where both the Manual and Auto Shutter are supported.
The shutter range varies from 1us ~ 3600sec. For Shutter control inquiry and status register, follow the same definition
as “BRIGHTNESS”
Shutter Speed Value & Range
1394 Shutter Value (Y) Increment Step
Shutter Speed Time : T
Exposure Time Range
1~500 1us T= Y us 1us ~ 500us
501~1000 10us T= (Y-500)*10+500 us 510us ~ 5500us
1001~1705 100us T= (Y-1000)*100+5500 us 5.6ms ~ 76ms
1706 ~ 2399 1ms T= (Y-1705)+76 ms 77ms ~ 770ms
2400~2902 10ms T= (Y-2399)*10+770 ms 780ms ~ 5800ms
2903~3304 100ms T= (Y-2902)*100+5800 ms 5.9s ~ 46s
3305~3508 1s T= (Y-3304)*1000+46000 ms 47s ~ 250s
3509~3843 10s T= (Y-3508)*10 + 250 s 260s ~ 3600s
Shutter Speed Example
Example Shutter Speed Table
1394 Shutter Exposure Time
1394 Shutter Exposure Time 1394 Shutter Exposure Time
1 1us 1729 100ms 3378 2 min
10 10us 1829 200ms 3438 3 min
100 100us 2129 500ms 3513 5 min
500 500us 2422 1s 3525 7min
550 1ms 2522 2s 3543 10 min
650 2ms 2822 5s 3603 20 min
950 5ms 2944 10s 3663 30 min
1045 10ms 3044 20s 3723 40 min
1145 20ms 3318 60s 3783 50 min
1445 50ms 3323 65s 3843 60 min
