Yongnuo YN600EX-RT II released with both radio & optical TTL - Lighting Rumours
Amazon.com : YONGNUO Updated YN600EX-RT II Wireless Flash Speedlite with Optical Master and TTL HSS for Canon AS Canon 600EX-RT w/EACHSHOT Diffuser : Electronics
Amazon | YONGNUO 製 YN 600EX-RT II Speedlite Radio Slave Flash Canon専用 ラッシュスピードライト TTL機能搭載ストロボ TTL 1/8000s AS Canon | YONGNUO | フラッシュ・ストロボ
YONGNUO YN600EX-RT II GN60 TTL Flash For Canon Camera