50D second curtain sync with radio trigger

[District_History_Fan]

I don't believe that Canon's wireless ETTL allows second sync. My 550EX and 430EX slave won't do it. It does suck.

[Sean Setters]

To set the second-curtain sync on a 550EX you have to press the (+) and (-) buttons simultaneously. That cycles between normal, rear-curtain sync, and high-speed sync. Check out the online manual here.