Full e-TTL II with the freedom to move around. What’s not to like? Works beautifully with long range and high-speed sync. Just wish Canon would buy out or license the technology and put them into their Speedlights. Would pay more for the feature but actually I need a better ST-E2 transmitter. Come on Canon! I plan to acquire another transmitter and a couple (like 3-4) receivers. Photos to come!


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