YONGNUO YN-568EX II TTL Master High Speed Sync 1/8000s Flash Speedlite for CANON SUPPORTS HIGH-SPEED SYNC FLASH, YN568EX II is the first speedlite supports high-speed flash in China; 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.MASTER CONTROL,OFF CAMERA,HIGH SPEED AND HIGH INDEX ARE ALL EQUIPPED HIGH GUIDE NUMBER+ TTL + HIGH SPEED SYNC GN58@ ISO100, 105mm; which reaches the level of the mainstream hot shoe flashes, supports HSS, TTL/M/Multi mode. EQUIPPED WITH 2.5mm PC SYNCHRONOUS INTERFACE It makes things easier on lightening the flashlight synchronously by using PC synchronous line. COMPATIBLE WITH Ns and Cs WIRELESS FLASHING SYSTEM. COMPREHENSIVELY SUPPORTS TTL FUNCTIONS The YN568EX II supports HSS, FEC, FEB, Rear-curtain sync, FE lock, Modeling Light, Canon camera menu accessible, 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 Ns 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. 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). APERTURE PREVIEW Press the cameras aperture preview button, the YN568EX II will send out continuous flash lasting one second for subjects imaging.