The YN-568EX is Yongnuo's first TTL flash supporting high-speed sync (HSS). This means one can use it in TTL and manual mode with shutter speeds up to 1/8000s, all controlled by the camera's external flash menu. One more outstanding feature is the compatibility to both the Canon and Nikon wireless flash system. It is possible to use the same flash as slave in Canon and Nikon environments with full support of TTL and high-speed sync. Because the hot shoe is different from Nikon and Canon, the Canon version only can be used on top of Canon cameras with TTL but still supports wireless Nikon TTL and high-speed sync.
Wirelss TTL Slave mode (both version)
Canon 5DIII 7D 60D 600D 650D, Yongnuo ST-E2, Canon 580EX II Nikon SB-900, SB-800, SB-700, Commander SU-800, Camera with CLS i-TTL system: Nikon D4, D3x, D3s, D3, D2x, D700, D300s, D300, D200, D7000, D90, D80
Hot shoe E-TTL mode (Canon Version)
Canon 1Dx, 1Ds series, 1D series, 5DIII, 5DII, 5D, 7D, 60D, 50D, 40D, 30D, 20D, 650D/T4i, 600D/T3i, 550D/T2i, 500D/T1i, 450D/Xsi, 400D/Xti, 350D, 1100D, 1000D
Hot shoe I-TTL mode (Nikon Version)
Nikon D4, D3x, D3s, D3, D2x, D800E, D800, D700, D600, D300s, D300, D200, D7000, D90, D80, D5200, D5100, D5000, D3100, D3000, D60, D40, D40x