SON.A.004 not firing V5

Son.1.002 (on Sony A7iii) would trigger my V5 (with Canon flash attached)... but since updating to SON.A.004, it no longer triggers the V5.

I've revered to Son.1.002 for now to get it to work again - is there a fix with SON.A.004?


  • The "A" version firmware is a new firmware generation that would not support the legacy firmware of the V5 anymore.

    Please checkout the compatibility of firmware versions between different Cactus devices here.

    To trigger the V5, please use SON.1.002 or earlier versions.
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