ELC Pro HD and Hi-Sync

ELC Pro HD is not optimized for Hi-Sync.
Hi-Sync works particularly well with slower flash durations but the ELC Pro HD was built to have fast flash durations.
The ELC Pro HD 1000 will produce better results at full power than the ELC Pro HD 500.
On the display of the ELCs, you can see the flash durations for each power level, please pick up the lowest flash duration for better results.