Is it possible yet to use off-camera second-curtain-sync with any of Canon's native wireless-radio-flashes?

After searching, I can't find any recent articles on this. Most of the older articles assume it will only be a matter of time before Canon fix their "oversight" to allow off-camera second-curtain-sync. But, nowhere can I find anything to say Canon have actually done so yet — which, admittedly, probably answers my question. Nevertheless, it'd be good to know definitively.

Currently, I'm using one or two Canon EX430 II flashes along with Yongnuo triggers which allows off-camera second-curtain-sync, but it is cumbersome solution — too many batteries, too many on-buttons! Also, the Yongnuos, as good as they are, seem susceptible to radio interference and occasional misfire. Being able to use Canon wireless-radio-flashes would be much less hassle.

4 Answers 4


And, from the horse's mouth ...

Thank you for your request and for contacting Canon. Regarding your enquiry about second-curtain sync on the Canon Speedlite 430EX III RT, I have to confirm that second-curtain sync is not available during wireless flash shooting.

Unfortunately, I don’t have information regarding the inclusion of this functionality in the future.

Email from Canon Services & Support (UK)

  • That's the official Canon line, but it actually does work with some third party radio triggers/receivers because they fool the flash into thinking the receiver hooked to the flash is the camera.
    – Michael C
    7 hours ago

Canon RT flashes and RT triggers will not do what you want. There are 3rd party RT triggers and flashes that will.

The Yongnuo YN600EX-RT and YN-E3-RT, for instance. Unlike your Canon 430EX II flashes, the YN600EX-RT and several other third party flashes have RT receivers built in, so you could eliminate the need for external trigger receivers and the accompanying batteries for each of your flashes.

Since this answer was originally written, I've also used the Flashpoint R2 Pro Mark II (rebranded Godox radio transmitter) and Godox X1R-C receivers to use second curtain sync with my 430EX II.

I've also dumped all of my Yongnuo flashes and replaced them with Flashpoint/Godox products. In my experience the Godox stuff has been very reliable, unlike the Yongnuo flashes.


No, there's no news. And the -RT system can't do 2nd-curtain any more than the Canon "smart" optical system was ever able to do it for, what was it, 14 years (the 550EX was introduced in 1998) before the RT system was introduced in 2012?

Not sure why you'd think this picture would change. If you want a built-in radio triggering system that does 2nd curtain, get a Yongnuo flash with a built-in transceiver, or a Godox TT685C/V860IIC and XproC, or Phottix Mitros+ and Odin II or whatever. If you don't like your Yongnuo gear, dump it and move on. And while you'd prefer an OEM system, if the OEM system doesn't do what you want, then you have to settle for 3rd party.

Frankly, this just sounds like complaining that Canon won't do what you want. While it's understandable, it doesn't actually do much good. Canon still hasn't made an EF-S 35mm f/1.8, either, despite all of us crop shooters pointing out how it would be nice if they did, like Nikon has. :)

  • 2
    The most recent comments I could find online were made in 2015. At least two reported Canon Reps had indicated the exclusion of second-curtain-sync (SCC) from the RT feature-set was an oversight and a fix was on its way. The logic being that whilst there was no easy way to implement SCS using optical-wireless — as, obviously, a pulse of light can't be used to initiate the flash just before the shutter closes — no such problem existed when using radio. So, no, this isn't me just me grumbling, but an attempt to see if this apparently promised feature has been introduced.
    – mooie
    Apr 1, 2018 at 16:08

I'm not familiar with this particular issue and no longer own any Canon bodies or flashes, but unless I misunderstand the situation, it sounds like you have the equipment at hand to very easily answer your own question. Or do I misunderstand? Just set up a shot with motion and a long exposure and attempt to use 2nd curtain sync (wirelessly). And see if it works. Shoot with first curtain and second curtain and verify you see the difference. If you don't see a difference between the two shots (i.e. both are "first curtain"), the issue still exists, right? Otherwise, it's an old issue that's been resolved. Does that make sense?

  • Thanks. But, perhaps I didn’t make my question clear: the current flashes I have do not have wireless-radio capabilities. I’m asking as I’m thinking of upgrading, but only wish to do so if second-curtain-sync is possible.
    – mooie
    Apr 1, 2018 at 15:54
  • 1
    Even if the OP had some Canon wireless flashes, it's entirely possible that a firmware update could address the issue. Asking about it here isn't an unreasonable thing to do.
    – Caleb
    Apr 5, 2018 at 17:59

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