Wireless Flash with Three receiver Groups ... 2. Set the wireless mode to <sender> 4 . Disable the sender units flash firing ... With the EOS ELAN II / ELAN II E / 50 / 50 E , EOS REBEL G/500N, EOS IX, EOS IX LITE/IX7, EOS REBEL 2000/300 and REBEL XS N/REBEL G II/EOS 3000N/66, the flash ratio cannot be set with multiple Speedlites
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