... as an AF assist beam (with ... ... of illumination with four fully-charged ... 4 . Select [ ... ... /XSi, T 1i, T 2i, T 3, T 3i, ... III / Mark IV , EOS- ... Wireless E -TTL Flash ... ... any one of four channels and three ... ... , 3 or 4 ) must match ... ... , ST- E 2 transmitter or ... 4 . Set the ... ... device for Wireless E -TTL flash ... 4 . Set the camera to Remote/Self-Timer mode. ... AF- Assist Beam
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