Canon EOS REBEL T3 Basic Instruction Manual page 429

Once-difficult wireless flQsh photogrQphy is now Qbreen.
Canon's latest EOS cameras have built-in support far wireless flash
photography. EOS automatically controls off-camera external flash.
(.tting you .asily take advantag. of this v.rsatil. shooting
technique without the bother of diffICult settings.
USe Q diffuser to creQte Q soft Qmbience.
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