Pass-through with TX

Hi all, Is it possible to use pass-through to a falsh on the camera and use the same Cactus unit as a TX to a second flash.
I've only got one flash (SB600 on Fuji X-T1) so can't try this.


  • Yes, that's possible as long as the flashes are supported.

    Note that the standard multi-brand firmware does not support TTL pass-through between different flash systems (e.g., not between Fuji and Nikon).
  • Yes.

    Pass through a flash signal to trigger a flash is not a problem.

    Using the Multi-brand HSS firmware (e.g. version 1.1.013), the V6 II can auto-detect your camera (Fujifilm) and flash (Nikon), you will be able to:

    1. Control flash power output level (hold down V6 II Menu button and scroll Adjustment Dial at the same time)
    2. Control flash zoom range (same as above, after setting SWAP CONTROL in Preference to ZOOM CONTROL)
    3. Cross-brand HSS: Flash triggering at shutter speeds up to 1/8000s. 

    With the Fujifilm X-TTL firmware (version you can do the above three things plus:
    1. Cross-brand TTL with the on-camera flash, such as mounting a non-Fujifilm system flash (Nikon SB-600) on your Fujifilm camera and get TTL.

    Hope this helps.

    Thank you.
    Antonio Lao
    Brand Manager

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "NIK.A.001", "v.103", or "A06".

    TTL or HSS not working on Cactus V6 II and V6 IIs? Be sure to check hot shoe connectivity by doing the <CAMERA INFO> check.

    Feel free to suggest an improvement or share product ideas. Contact us directly at  At Cactus, we listen. 
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