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 /

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. Supports C's optical transportation wireless master flash; Compatible with C and N's optical transportation wireless slave flash. Supports high speed sync(HSS) flash and with high speed recyling(2s) system. Supports firmware upgrade: --The YN568EX III is equipped with USB interface, you can download the latest firmware from official website to upgrade the speedlite. Equipped with large-size LCD display and 2.5mm PC interface, and supports the battery remaining power real-time display, convenient to use. Supports C's optical transportation wireless master flash, Compatible with C and N's optical transportation wireless slave flash: --In the optical transportation wireless flash shooting, the YN568EX III can be Secondhand 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.