The Yongnuo YN568EX III flash can operate as a master unit for YN600EX-RT II, YN568EX II, YN568EX III, 600EX(II)-RT, 580EX II, SB-910, SB-900, SB-800, and SB-700 flashes. It also functions as a TTL slave in Canon and Nikon systems. It can be wirelessly triggered via TTL from Canon cameras 7D, 60D, and 600D. Any settings made on the master unit will be transmitted to the YN568EX III flash (FEB, FE lock, manual exposure setting, etc.). It features electric zoom, automatic and manual, with a focal length range from 24 to 105mm.

Specifications:

• Guide Number: 58 (ISO 100, 105mm)
• Functions: TTL, M, Multi, Master E-TTL, Slave S1, S2, Sc (E-TTL), Sn (iTTL)
• Full TTL support: FEC, FEB, FE lock, modeling light, access to settings from the camera menu
• Zoom range: 24, 28, 35, 50, 70, 80, 105mm, compatible with FF or crop sensors
• Vertical tilt angle: 7-90 degrees
• Horizontal rotation angle: 0-270 degrees
• Power Supply: 4xAA batteries
• Less than 3 seconds at maximum power
• Zoom: 24-105mm
Color temperature: 5600K
• Flash duration: 1/800 – 1/20000s
• Synchronization port 2.5mm and USB interface
• AF-Assist light and sound signals