Press Release 1 Nissin Marketing Limited announces the High Speed Synchronization function (HSS) will be available for existing Nissin flash users in mid-May of 2017 (for Nissin Speedlight Di 700 A, Air 1, i 60 A, i 40 ) We noticed a high-demand from our customers regarding the use of HSS function in Nissin products … Continue reading Nissin Postponed High-Speed Sync. Support for FUJIFILM to Mid-May (Firmware Update only via Nissin Official Service Center)