Brightness-based flash duration analysis for a Godox Witstro AD400 Pro studio flash unit (400 Ws) over 9 f-stops (power settings 1/256 up to 1/1).
Generated by the FDM-1T flash duration meter.
As an additional feature, the flash unit displays the t0.1 flash duration value to be expected for the chosen power setting.
The following table compares the values shown by the AD400 with the measurement results obtained by the FDM-1T flash duration meter.
| t0.1 [1/sec] | AD400 Power Setting [1/max] | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 256 | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | |
| AD400 | 12340 | 9900 | 7690 | 5780 | 4200 | 2770 | 1650 | 790 | 230 |
| FDM1T | 10012 | 8230 | 6937 | 5479 | 3985 | 2645 | 1538 | 726 | 215 |