YONGNUO USB Cameras Slave Upgrade GN 58 1 8000 s High Firmware Wal Master YN 568 III 568 EX II 4 -Channel DSLR Supports TTL E-TTL Wireless Replacement for Sync Camera YN- Speedlite Flash Speed /

Supports C's optical transportation wireless master flash, appropriate with C and N's optical transportation wireless slave flash: --In the optical transportation wireless flash shooting, the YN568EX III can be used as a master unit to trigger YONGNUO and C's EX series speedlite(except the YN585EX), and supports 4 channels, realize wireless TTL, manual flash and stroboscopic flash.. Equipped with large-size LCD display and 2.5mm PC interface, and supports the battery remaining power real-time display, convenient to use. Supports firmware upgrade: --The YN568EX III is equipped with USB interface, you can download the latest firmware from official website to upgrade the speedlite. Supports high speed sync(HSS) flash and with high speed recyling(2s) system. Supports C's optical transportation wireless master flash; matching with C and N's optical transportation wireless slave flash. GN58@ISO100, 105mm, and supports automatic & manual zooming(24-105mm): --High index TTL flash, supports TTL, M, Multi flash; and supports supports automatic & manual zooming, the focal length can be varied between 24-105mm