600EX-RT AF Assist light

Started Oct 16, 2012 | Questions thread
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Clive Photo OP New Member • Posts: 13
Re: 600EX-RT AF Assist light

Yep, found it C.Fn-23 (Slave Flash Battery Check). Nothing to do with focus assist, it flashes to indicate the unit is charged and ready to go.

Thanks for your efforts. I just wish they'd mention these things in the relevant place or at least in the index.

selected answer This post was selected as the answer by the original poster.
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