TTL pass-through gets confused

Hi there,

I have been using a few V6's for a few months now. My setup is a V6 on a Canon 5D Mk3 and either a 600ex or 580ex 11 on top of the V6 (on camera) and TTL pass-though enabled. 

I initially had some weird behaviour and found that if I set the flash back to ETTL everything works fine. I can then happily shoot for a long time and all is good, but sometimes, and this has happened regularly, the TTL pass-through gets confused and starts emitting more flash power than it should. For example I may be shoot with +0.8 flash exposure compensation, and suddenly the images are a lot brighter. To resolve the issue I have to remove the flashgun, turn off the V6, fit the flashgun again and turn on the V6. 

So bottom line is something is going wrong with the TTL pass-through over time. 

Any comments would be appreciated.

Thanks,
David

Comments

  • Hello David,

    When using the V6 with Canon flashes in TTL pass-through mode, please select the flash profile to Canon flash according to the flash mode. If not, the TTL pass-through may not function properly.

    BYW, have you updated your V6 to the latest firmware? To check it, please press and hold the A + D button, then switch it to either TX or RX mode from Off position. The firmware version will be shown on the display.

    Hope that helps!

    Ray Chan

    Senior Product Specialist
     
    Cactus®
    Harvest One Limited
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