Yongnuo Professional Flash Speedlight Flashlight Yongnuo YN 568EX II for Canon Nikon Camera / Such as: Canon EOS 1Ds Mark, EOS1D Mark, EOS 5D Mark,Canon 5D Mark111, EOS 7D, Canon G10,Canon T3i,T4i,T5i ,Canon SX50 HS EOS 60D, EOS 600D, EOS 550D, EOS 500D, EOS 1100D, EOS 70D The YN-568EX II is Yongnuo's first TTL master flash Supports high-speed sync flash with high-speed sync (FP flash), the YN568EX II can synchronize with all shutter speeds. The maximum shutter synchronous speed is up to 1/8000 High guide number, TTL and High speed sync: GN58@ ISO100, 105mm; which reaches the level of the mainstream hot shoe flashes, supports HSS, TTL/M/Multi mode. Multiple trigger mode supported: The YN568EX II can be triggered by the camera set-top, built-in or main-controlled flashing command, S1 and S2 (pre-flash-canceled mode). Compatible with N's and C's wireless flashing system: One YN568EX II is able to respectively accept internal flashing of YN568EX II, 580EX II, SB-910/900/800/700, 7D/60D/600D, C commander of N's built-in flashing and ST-E2 wireless signal, achieves off camera TTL and manual flashing. Some beckoning functions such as wireless TTL flashing, grouping light ratio TTL flashing and the illumination of remote controlled flashing can be easily achieved only if you carry a camera with built-in flashing command system and YN568EX II.