Setting up the Fuji with the Cactus devices, type V6 II

Before you order and buy:

Determine how many units your set-up requires

If you only ever work with 1 off-camera flash unit, you need 2 devices. One acts as a radio signal sender (TX) from the hotshoe of the camera, the other is a radio-signal receiver underneath your off-camera flash (RX).

If you regularly use 2 off-camera flash devices you need 3 units.

If you want to be able to activate your camera shutter remotely, you need 1 additional unit.

The devices multi-task: all can act as sender (TX) or receiver (RX).

Additional hardware
  1. Cactus-to-camera cable for remote shutter triggering
  2. Regular USB to mini USB cable

Ad 1:

I used an existing cable from a TrigMaster remote unit set. Cactus is now also working on a cable that connects to the mini usb connection on the Fuji X-t2 body but I have not tried that yet, as the cable is on backorder. I have put the TrigMaster cable's 2.5 mm plug into the camera and the other (bigger) end fits the Cactus.

Ad 2:

This is a regular cable that you probably already have in your hardware set

Additional software

You must check the firmware version on your units once you receive them and upgrade if needed. For that, you need to go to the Cactus site and get the download relevant to your computer's operating system and the process is described below

Once you have everything, follow these steps.

1. Unpack your units and open up one of the booklets that come with it. Spread out the white one and familiarise yourself with the names of the buttons and dials on the units (no, really!) Warning: do NOT be tempted at this stage to put in the batteries and play with any of the buttons until you have read and understood all of the steps below, or you will run the risk of messing things up to the point of frustration and have to do a factory reset to start from scratch. I speak from experience... ;) By the way, a factory reset will not touch the firmware but it will undo any customs settings you may have put in. Always a good last resort to have.... but still....

2. Check your firmware version for each device;

  • Make sure to have the unit in your hand in such a way that you can operate the buttons underneath the display WITHOUT touching the test button on the front of the unit. You do NOT want to press down on it until you know what it does. Trust me. This is important. Now, press the Menu button
  • Use the wheel to scroll to Preferences using the display, then press the OK button
  • Use the wheel to scroll through the options. Firmware is one of them
  • I went here to find the relevant firmware updater, downloaded and installed it and followed directions on screen to upgrade the firmware to the latest version using the USB/mini USB cable to connect the units to my computer; I am a Mac user and when you read the steps the .app tells you to take, the installation process was simple and straight forward. My firmware currently is 1.1.005.

3. Setting up for 1 or multiple off-camera flash units, using the camera in-hand (no remote triggering).

  • Slide 1 Cactus unit onto the hotshoe of your camera. Switch camera on. Switch unit on by setting it to TX
  • Slide Cactus unit underneath your flash device(s). Switch on the flash unit(s). Switch on the Cactus units by setting to RX
  • Set your camera to either Auto shutter speed or dial in 1/250th or slower; 1/250th is official maximum Fuji sync speed.
  • The V6 ii units can be set to auto detect camera and flash. Using your manual, check the settings and reset if required
  • Take a test shot. The flash unit(s) should fire.
  • Note: you can set your flash to TTL but this will probably not give you the desired results. So go to Manual and take some test shots to regulate the power on your flash. There are settings on the unit that you may prefer to use but this is something to play with as you get to know the equipment and not relevant to this instruction

4. Setting up for remote camera operating

  • Slide 1 Cactus unit onto the hotshoe of your camera. Switch camera on. Switch unit on by setting it to RX
  • Connect the hotshoe Cactus unit by cable to the remote connection on the body of your camera; for now I use the 2.5 jack plug cable because the mini USB Cactus cable is on backorder. I will update this site when I get a hold of it and have tested it.


  • Slide Cactus units underneath the flash device(s). Switch on the flash units. Switch on the Cactus units by setting to RX
  • Set your camera to either Auto shutter speed or dial in 1/250th or slower; 1/250th is official maximum Fuji sync speed.
  • The V6 ii units can be set to auto detect camera and flash. Using your manual, check the settings and reset if required
  • Take the remaining V6 ii unit and switch it on by setting it to TX
  • Do the folllowing on the hand-held unit AND the hotshoe unit:
    • Open the menu and go into "Options"
    • Use the wheel to navigate to RELAY and set to ON, confirm and exit the menu
  • Now you are ready to operate your camera (that is presumably now attached to a tripod) remotely by pressing the test button on the hand-held Cactus device.
  • Alert! Make sure to ONLY press down lightly and quickly. When pressed down for too long, the units easily switch to BULB mode and this will make your camera go haywire and keep taking pictures unless it happens to be on Bulb mode as well. If the latter is the case, all is well and the first press of the test button will open the shutter, the next will close it so you can work with long exposure times.
  • If the bulb mode came on (visible in display) by mistake, the easiest way to stop the camera's motor drive is by pressing the test button again. Then do a factory reset to get rid of it and reset the Relay mode and other customised options manually on both relevant units. This is the only minus I have about the Cactus equipment. Other than that, they operate smoothly and easily. I would have loved for the Fuji to support remote operation without an additional cable, but there is nothing I can do about that. It sure is a better set-up with all Cactus units firmly fastened to the camera and flash-units without anything else dangling from the camera with the risk of dropping and losing it. The number of scenarios where I will need to be able to remote trigger both camera and Cactus units is limited but I am happy that I have now found a way to do that is relatively elegant.

I hope this instruction helps others out there who are as frustrated as I have been about combining the Fuji with external flash units and lack of knowledge Fuji people demonstrate about setting this up. The Cactus units support an acceptable array of flash brands and I was able to operate both a Chinese Canon knock-off (YN565EX) speedlite AND a real Canon 580 EXii at the same time with a Cactus on the hotshoe. Even if I had to order a fourth V6 ii unit to my equipment to be able to remotely operate the shutter with 2 off-camera flash units, the total price is still acceptable. Check it out and you keep shooting, to mimic one of my favorite pro-photographers Bryan Peterson's favorite saying!