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Strobist: Two shoot-thru umbrellas, one from left, one from right. Nothing special about this shot, but the fact, that I tried out my Yongnuo ST-E2 to be able to trigger the modeling flash (= modeling light) of my 430 EX II and my 580 EX II. Worked just fine, and now, I finally found out also, how to adjust the flash power (in this setup) manually: had to press this mode button 4 sec., that's all. Works just fine: remote-triggered speelites + modeling light + manual power adjustment. Note: In the Manual Mode, the power of the modeling light is directly proportional to the flash power setting (I guess, that makes sense ... ).