I was playing yesterday with my Fuji X100T and got curious if I can use my Canon 600 EX-RT Speedlite as an optical slave to the built-in flash on my Fuji X100T. Is this possible?

  • I've had great success with a pair of wireless third party links. In my case the Yongnuo.
    – Unapiedra
    Nov 25, 2014 at 22:37

5 Answers 5


You can buy cheap flash triggers that will trigger a flashgun via a PC cable or hotshoe adaptor. They just look for a flash of light, then trigger the connected flash. May be enough for you if you're using the Speedlite in manual mode and the Fuji is only generating one flash (any pre-flashes for red-eye reduction, or ettl metering would need to be disabled)

Here's one I used to use with an old flashgun:

Picture of Flash Sync Slave with hot-shoe to PC cable adaptor

The Flash Light Slave Trigger bit has a PC socket on the back so can be connected to trigger any hot-shoe flash gun with the PC to hot-shoe adaptor also in the picture.

You can also get the flash slave trigger built right into a hot-shoe adaptor e.g.

SYK-4 Wireless Hot Shoe Flash Remote Controller Slave Trigger w/ PC Sync Socket-eBay

  • Thanks! I'll check it out :-) Or might just go with a sync cord.
    – S. M.
    Nov 26, 2014 at 14:27

The 600EX-RT doesn't have a built-in dumb optical slave, it only understands the Canon wireless communication systems (optical and radio), which the Fuji doesn't speak. However, you could stick a dumb optical slave (such as the green-based Sonia optical triggers) on the PC port of the 600EX-RT, and trigger the flash manual-fashion if the Fuji's pop-up flash can be fired without a pre-flash (i.e., not in TTL). And, of course, radio triggers or sync cables would work with the 600EX-RT as a manual flash.

You can also use a Yongnuo YN-E3-RT dedicated radio transmitter unit, and you'd have remote manual power control over the 600EX-RT, but you do have to press the test button to transmit settings before you take the shot. No TTL or HSS. The Canon ST-E3-RT, however, won't work for this.


Doubtful. Canon's flash system uses a special set of pulses to communicate flash power information and sync details to the flashes in the system.

It is unlikely that your Fuji camera implements support for this protocol and without that support, you can't remotely fire the 600EX-RT.

There are other third party speedlights and strobes that you can get that do simply trigger off the flash or pre-flash of another camera though. Those would work fine with your X100T.

  • Ok, thanks. That's unfortunate but oh well... Funny thing is I can fire the flash mounted on the camera in manual mode but can't use it as an optical slave :-(
    – S. M.
    Nov 25, 2014 at 18:24
  • @S.M. if you use it in manual mode, I believe you can also use it as an optical master for other Canon speedlites, but it needs to be a Canon master unit as far as I know. I'm not sure if there are any third party Canon master units or not.
    – AJ Henderson
    Nov 25, 2014 at 19:07

Hey guys & X100T fans,

I've triggered my Canon 580ex flash with my Fuji X100T using a PocketWizard setup. No it will not do any TTL triggering but I shoot manual anyway and don't need TTL control when I'm shooting with the Fuji. The center pin on the X100t should trigger most wireless flash transmitters properly.



Unfortunately the 600EX pc terminal is designed for a trigger from a canon camera through a sync cable and when you use optical triggers the flash will fire once and then turn off the sync terminal to protect itself, you then have to turn the flash off and back on again to reset the flash terminal so it will work again, apparently there is some optical triggers out there that will not course this problem but you will have to do some research to find one.

  • Note that the use of the PC port on the flash was not mentioned in the question.
    – Hugo
    Mar 20, 2015 at 13:11

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