Timing issues - Olympus OM-D EM-1 V6 and Nissin i40 TTL pass-through

After some pass-through TTL issues with a Nissin i40 on the V6 on an Olympus OM-D EM-1 (which seem to be down to the power-on order - I had to go bottom (camera) first) I am having some timing issues.

This is a rare setup which I would only use in rare occasions (e.g. wedding photography dancing) but was part of my testing.

Camera is an Olympus OM-D EM-1 - V6 on the hot shoe and a Nissin i40 in TTL pass-through mode (and in TTL) mode

Two remote groups - A is an Elinchrom Quadra triggered by a V6 in receiver mode and cable connected

B is an RF60 

A and B flashes are in manual mode obviously and are used as accent/rim lights

The onboard TTL flash is providing the key light.

Both channels are flashing - but the A channel is not appearing in the camera frame.

Anyone any ideas how to fix - clearly some timing issue.




  • Hello Alan,

    Thank you for your inquiry.

    Have you tried shooting:
    1. Without mounting the Nissin flash and turning TTL PASSTHROUGH off? 
    2. At a slightly lower shutter speed? help with synchronizing with the Elinchrom?
    3. Only with the Elinchrom setup?


    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 info@cactus-image.com.  At Cactus, we listen. 
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