flash won't fire

I can't seem to get my cactus v6 and rf60 working together.
I should be in the right group etc. when I spin the wheel to modify the flash power, I can see the numbers on the flash moving.
But the flash just won't fire. What am I doing wrong?
If i hit the test button, the flash goes off. Should the test light be on all the time?


  • If the flash fires when you press the test button on the V6 but the flash does not fire when you take a photo that means that your camera is not sending a trigger signal to the V6.

    What camera are you using?

    If it is a Pentax, you need to make sure that the shutter speed does not exceed 1/180s, otherwise the camera won't generate a trigger signal.

    Some mirrorless models require the activation of a mechanical shutter mode (instead of electronic shutter), before they generate a trigger signal for a hot-shoe flash/trigger.
  • Sounds like a V6 hot shoe connection issue.  Do let us know what camera you are using.
    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", "FUJ.1.002", "v.103".

    For the time being, Cactus V6 (MK1) running on firmware version 2.1.001 can be triggered by a V6 II (MK2) running on Multi-brand HSS firmware (e.g. 1.1.013) and not by X-TTL firmware versions: PEN.A.001 and OLY.A.001.  No schedule has been released yet. 

    Cactus RF60X / RF60 Firmware versions A01 and A02 currently ONLY works with PEN.A.001 and OLY.A.001.  Other "A" version of X-TTL firmware will be released soon. For both Multi-brand HSS and X-TTL firmware versions (FUJ, SIG, SON), install firmware version 103 / 205 on your RF60X / RF60.

    Cactus RF60 is now an off-camera TTL flash with firmware version 205 or later!

    Metz M400 (for Fujifilm) is now supported on the Cactus V6 II (HSS and TTL).

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
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