YONGNUO YN568EX III Wireless Flash Speedlite Master TTL Slave For Canon (Black) Features 1. Support C optical transportation wireless master flash: In the optical transportation wireless flash shooting, the YN568EX III can be used as a master unit to trigger YONGNUO and C EX series speedlite(except the YN585EX), and supports 4 channels, realize wireless TTL, manual flash and stroboscopic flash. 2. Compatible with C and N optical transportation wireless slave flash: One YN568EX III can respectively accept the master unit of YN600EX-RT II, YN568EX II, YN568EX III, 600EX(II)-RT, 580EX II, SB-910900800700, for Nikon internal flash and for Canon commander and wireless signal of 7D60D600D, realiszs external TTL, manual flash and stroboscopic flash. 3. 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. 4. Supports high speed sync(HSS) flash and with high speed recyling(2s) system: The YN568EX III can synchronize with all shutter speeds, realize TTL and manual flash, 18000s maximum shutter sync; and the recyling time for full output just takes 2 seconds. 5. Multiple trigger modes, automatic settings saving and custom setting supported: YN568EX III can be triggered by the camera set-top, PC synchronization trigger and wireless optical trigger off the camera. 6. Supports firmware upgrade: The YN568EX III is equipped with USB interface, you can download the latest firmware from YONGNUO official website to upgrade the speedlite. 7. LCD Display: Equipped with large-size LCD display and 2.5mm PC interface, and supports the battery remaining power real-time display, convenient to use. YN568EX III C Suit for 1), Hot shoe TTL mode: For Canon 1Dx, 1Ds series, 1D series, 5DIV, 5DIII, 5DII, 5D, 7D, 7DII, 6D, 80D, 70D, 60D, 50D, 40D, 30D, 20D, 800D, 750D, 700D, 650DT4i, 600DT3i, 550DT2i, 500DT1i, 450DXsi, 400DXti, 350D, 100D, 110