YongNuo YN-E3-RT – Now Available!

The recently announced YongNuo YN-E3-RT radio transmitter for Canon are now available for around $150 $100.

The YN-E3-RT, and coming YN-600EX-RT flash unit, are the first and only third party radio trigger and flash units to be directly compatible with Canon’s own 600EX-RT and ST-E3-RT radio enabled flash and transmitter.





Updating Firmware -


Firmware download links are found at the bottom of the page here –



A number of firmware versions have been released since the YN-E3-RT was first released. These updates resolve a number of bugs and also add some features.

You can check the firmware version in Menu 4 on the transmitter to see if its up to date with the latest version. If not, its generally a good idea to update.

The update software is currently for Windows only.

You need to download both of the links – “Driver & Software:” and “Firmware v1.XX:

Unzip both packages to a folder on your computer (for windows Vista and later – right click on the folder, and “Extract All”)



YongNuo YN-E3-RT

The YN-E3-RT transmitter includes all the features of the Canon ST-E3-RT, as well as extra features including –

  • AF Focus Assist light
  • USB port for firmware updates
  • Second curtain sync (in manual only)
  • Full Group Mode with pre-2012 cameras
  • Remote Manual Power Control with Non Canon cameras
  • Slave flash charge status does not stop other flashes from firing
  • Full sync speed maintained for pre 2012 cameras

YonNuo YN-E3-RT


YN-E3-RT features –

  • Two-way 2.4G  radio communication, fully compatible with Canon ST-E3-RT/600EX-RT
  • Control up to 5 groups (15 units) of Speedlites
  • 15 Physical Channels, 1 Auto Channel, Up to 10,000 customizable photographer ID
  • Transmission Range: 100M
  • Multi YN-E3-RT can share slave flashes
  • Display group/charge status of slave flashes
  • Firmware can be upgraded via USB
  • High resolution Dot-Matrix LCD, Backlight for LCD/keys
  • Fast lock mechanism
  • Built-in AF assist beam emitter, buzzer
  • Remote shutter release, Linked Shot
  • Flash Mode: ETTL/M/Multi/GR 4 flash modes
  • A/B/C/D/E 5 groups
  • Supports 1st Curtain, 2nd Curtain (Only in M mode), High speed Sync
  • Supports ETTL Ratio, Flash Exposure Compensation,
  • Flash Exposure Lock, Flash Exposure Bracket, Modeling Flash
  • 9 Custom Functions
  • Settings saved automatically
  • Dust and water resistance equivalent to EOS-1D series cameras


YongNuo YN-E3-RT

Until the YongNuo flash arrives, the original Canon 600EX-RT would currently need to be used with the YN-E3-RT transmitter.

There has been no indication as yet of when the YN-600EX-RT flash will be available.

 YN-622N-TX -

The much awaited YN-622N-TX transmitter (for use with the YN-622 TTL triggers) are reportedly still undergoing testing, and will likely available in the new year now.

The YN-E3-RT (and coming YN-600EX-RT flash) are not directly compatible with the YN-622C TTL triggers, or manual RF-602/603/YN-560 III systems.

Separate Receivers -

There is also currently no word on whether separate receivers will be available later to accommodate other current and previous Canon or YongNuo TTL flashes, or manual studio lights etc. UPDATE – YongNuo have now announced the YN300W TTL studio light.


Price and Availability -


The YN-E3-RT transmitter is now available now from around $120 –

AmazonEbayYongNuo Ebay Store


YN-E3-RT User Manual


Canon 600EX-RT – B&H PhotoAdoramaAmazon.

  1. Mel 1 year ago

    I would like to know if you put a yn-e3-rt on top of a Yn622c work, why I want to do this? so I can trigger my two 600ex-rt with the Yn-e3-rt and trigger my two strobes with the Yn622c at the same time, any idea? I have already the Yn-er-rt which work very good with my 6D.
    I can trigger the strobes already if I set them as slave but if I need to go over 1/125, I already have the

    • Author
      Flash Havoc 1 year ago

      Hi Mel,

      You definitely can’t run both units as TTL transmitters at the same time, as they are both trying to communicate with the camera at the same time.

      But the YN-E3-RT has a remote manual compatibility mode, so if you only want basic firing, and remote manual power control with the 600EX-RT, then you could likely stack the YN-E3-RT on top of the YN-622C in this mode. (Or worst case scenario would be to cover the TTL contact pins between them).

      But at the end of the day, the best option would be to just use extra YN-622C receivers on the 600EX-RT as well. And when the YN-622C-TX is available, use that as the transmitter for all the flashes.

      It’s a shame to have to use YN-622C on the 600EX-RT when they have their own radio, but its going to be a lot more practical and functional. Otherwise it would best to move on to all RT gear. Maybe trade your old non RT flashes for YN-600EX-RT when they are available.

      The YN-622C-TX should be a good alternative though, and relatively inexpensive for one of those and a pair of YN-622C.

      • Dean Martin 3 months ago

        Flash havoc, maybe you can help me figure this out.

        I have the YN E3 RT, I use it to control 2 Canon 600 EX RTs and 2 Yongnuo 600 EX RTs. Through my 5D III, everything is just how it should be, all functions are perfect and all flashes fire as expected. When I attach the YN E3 RT to my Fujifilm X-E2, with the E3 RT in Legacy mode, all set to manual, it will only fire the Canon flashes. I can test fire and all flashes fire, but when it comes to pressing the shutter, only the Canon flashes will fire.

        I am struggling to find any information anywhere on this. This was the only reason for purchasing the YN version alongside my Canon version, as the Canon doesn’t work with the Fuji’s.

        Hopefully it is something you can help with, or anyone else in here that has this combination and has figured it out.


  2. privatebydesign 1 year ago
    • Author
      Flash Havoc 1 year ago

      Thanks for that.

      I’m not sure why it has remained as a beta update for quite a while though.

  3. Cameron 1 year ago

    Here is my situation. I have a Canon St-E3-Rt and now a Yongnuo YN-E3-Rt. I would like to use both at the same time and fire my 2 600′s. One on each hip (5Diii & 6D) They both work great by themselves and control both 600′s fine. When both are turned on one goes green and the other goes orange. When I turn off the green one the other turns from orange to green. Whichever is on 1st gets the green light.

    If you read the YN manual it says “Multi YN-E3-RT can share slave flashes”

    Am I reading this correctly? Can I have multiple commanders and control several slave flashes?

    I also cannot get the AF assist light to fire on my YN-E3-RT, anyone else have this issue?

  4. privatebydesign 1 year ago


    Yes that is correct, it is all working as it should, you can have multiple “Masters” the first is the “Main Master” the rest, and there can be more than two, is a “Sub-Master”.

    Any of the masters has complete control of any and all flashes and the settings can be completely different, even the modes and groups.

  5. Nick 1 year ago

    I use the yongnuo yn-560 ii and I am looking for a way to remotely change the power settings. Does the YN-E3-RT do this and is it compatible with the yn-560’s?



    • Author
      Flash Havoc 1 year ago

      Hi Nick,

      Unfortunately no, there is no way to remotely change the power setting with the YN-560 II, as that function was never built into the flash.

      The YN-560 III does have a remote manual power control built in, but we are still waiting on the dedicated transmitter unit which will enable that.

      The only remote manual option currently available with a transmitter are the Godox V850 (and they are great flashes).

      • Nick 1 year ago

        Thank you for the response… I have been researching a little and was wondering if I can accomplish changing power setting remotely using the YongNuo YN-E3-RT and Yongnuo YN-565 EX.

        If you have a better solution that would great.. When I need to change power setting on any of my flashes I have to open up the soft box and change it manually… I am trying to eliminate this… Would like to accomplish this is the cheapest way



        • Author
          Flash Havoc 1 year ago

          Hi Nick,

          Sorry no the YN-E3-RT are only compatible with the Canon RT gear, and the coming YN-600EX-RT flash.

          The cheapest way will be the YN-560 III flash and the new dedicated transmitter (though we don’t know when that will actually arrive).

          But for a little more than that you can get the Godox V850 flashes and FT-16 transmitter, which are available now (and arguably a much better option anyway).

          • Nick 12 months ago

            I took your advise and got the Godox V850 you suggested and I love the flashes and the transmitter receiver combo… Great product so thank you …. One question I do have is do I need to get a different transmitter to take advantage of High Speed Sync?

            Thanks for all the help,


            • Author
              Flash Havoc 12 months ago

              Hi Nick,

              Ok great, thanks. Yes for HSS with Canon the simplest way would be a Godox Cells II transmitter.

              You can see some other options here as well. Though the Cells II are a good option if you don’t need to trigger other TTL flashes etc. Thanks.

  6. SithTracy 1 year ago

    Looks like YN-E3-RT firmware v1.10 was released.

    Change log:
    Version 1.10:

    Fixed: couldn’t set fec of group b/d via camera menu.

    Version 1.09:

    Fixed: update limit of flash number in Multi mode.
    Fixed: disable HSS in multi mode
    Added: P.FN: legacy trigger mode. When it’s set, YN-E3-RT won’t detect ettl
    input so that it can be used on Fuji hotshoes.
    Added: P.FN: Free Mask Group. This setting is used with GR/*. Free mask will
    be on/off when you hold GR/* button for a few seconds. When Free mask is on,
    groups not in this setting won’t fire. So you can take a photo with background
    flashes only quickly.

    • Author
      Flash Havoc 1 year ago

      Ok great, thanks Sith.

      • JJ 1 year ago

        Has anyone been able to get their hands on the latest firmware v1.10? When I go to their site the links are dead. Am I the only one? The link I am using is http://www.hkyongnuo.com/e-detail.php?ID=337

        • SithTracy 1 year ago

          I pulled it yesterday with no issue and updated. Also just tried the link again and got the file.

          • JJ 1 year ago

            Yeah I have it now, after several hours of dead links it suddenly worked. Thank for checking.

  7. Joe 12 months ago

    Quick question if anyone can please help. I want to buy one of these but need to know if it does HSS with the canon 6d! I know the canon version only allows HSS with the 5dmk3 and the 1d, no HSS is a deal breaker for me using the 6d and being stuck at 1/180th. Thanks again

    • Author
      Flash Havoc 12 months ago

      Hi Joe,

      Yes the YN-E3-RT will work with HSS with the 6D.

      Are you sure the Canon ST-E3-RT will not work with the 6D in HSS? I have not heard about that issue? Thanks.

  8. zak 12 months ago

    will this enable high speed sync between my 600ex-rt and my 7d? is there anything that works differently (or not at all) than when my flash is on camera? this looks like it might be a better option for me than the ST-E3-RT.


    • Author
      Flash Havoc 12 months ago

      Hi Zak,

      Yes it should work with the 7D with HSS.

      I think most functions should be the same as on camera, though Second Curtain Sync is only available in manual with the YN-E3-RT. Thanks.

  9. zaakir 12 months ago

    Having consistency issues with the 7D in ettl. first couple shots are fine, then either a full flash dump, or a misfire all together. In manual mode there is no issue, so there’s obviously a communication problem with the ettl metering.

    Seems to work fine with my 5D3, anyone else having issues with the 7D?

    I’m still on 1.08 as far as firmware.

    • Author
      Flash Havoc 12 months ago

      Hi zaakir,

      I’m not sure about any specific issues with the 7D. It may just be more of an issue with your 7D hotshoe being a little different.

      If you haven’t already done it, try cleaning the hotshoe contacts with some Isopropyl alcohol or similar.

      There is so much movement in the YN-E3-RT foot in the cameras hotshoe, and then the pins move around in the YN-E3-RT foot as well. So it doesn’t surprise me some people are going to experience issues.

      I really hope YN do something better with the coming YN-600EX-RT Flash foot.

  10. zaakir 12 months ago

    OK so after cleaning the contacts and extensive testing, I’ve determind there’s an issue with the/my 7D.

    The trigger works flawlessly with my 5D3, and even my mirrorless EOS-M. On the 7D however, it misfires. It even does it when you hit the FEL button. I didnt get full power dumps this time, but a number of misfires.

    I then decided to use a 600ex on the 7D as a trigger for my other 600ex, and viola, no issues what so ever. So apparently there’s a communication issue somewhere. Perhaps upgrading the trigger to 1.10 would help.

    further testing needed…

    • Author
      Flash Havoc 12 months ago

      Hi zaakir,

      Ok thanks for that. Can you please let YongNuo know what you have described above, as they may not see this here. service@hkyongnuo.com

      Thanks again.

  11. Stephen 12 months ago

    Anyone have an issue with windows 8 not seeing it? I installed the software and have the latest firmware, but it does not see the yn=e3=rt

    • SithTracy 11 months ago

      Go into your Device Manager and right-click scan for changes with the device attached. The latest version of the updater does not quite install correctly. I cannot recall the exact steps I did, but I was able to get the device detected after doing something in that area. There may have been a “splat” and I had to search for drivers for it.

    • Sean Holder 2 months ago

      Hi Stephen or SithTracy,
      Were either of you ever able to get the device to be recognized on Windows 8 or 8.1 I have been trying and no luck yet for being able to update the firmware.

      • Author
        Flash Havoc 2 months ago

        Hi Sean,

        I updated the YN-E3-RT a couple of days ago with Windows 8 and had no issues.

        You would be best to download the latest Driver and Software etc form the YongNuo site though.

  12. Jason 11 months ago

    Hey guys..anyone else experience poor performance in range, especially outdoors?
    Can’t get reliable performance more than 10m….it loses connection with the slaves.

    Have experienced this with all firmware versions…now running latest v1.10

  13. Marsu42 11 months ago

    Do NOT get this unit, it is unreliable and a waste of $150. I am stunned Yn dares to sell it like this.

    The af assist is a joke (misaligned on my unit, but even if not you have to wiggle the flash in the hotshoe to make a dot match a af sensor), the range is pitiful (~10m if you’re lucky and ~2m if near ground level) and worst of all it is useless for mission critical work: The Yn unit often loses connection with flashes and you have to power-cycle the controller, but worst of all the Yn shows “connected” but some flashes simply refuse to fire! A 1:1 comparison with a 600ex-rt shows that clearly the Yn controller is to blame.

    You’re better off with using a good ol’ optical link if line of sight allows it, this is a catastrophe and only “worth” it if you’re desperate to use rt with pre-2012 camera bodies. Remote 2nd curtain doesn’t work in group mode if you were wondering btw, just in a:b:c ratio mode.

    I hope Yn at least adds some reliability with fw updates, but now I understand why we haven’t heard anything of their other announced rt flashes. Time to apologize, Yongnuo!

    • Marsu42 11 months ago

      Addition: I am using fw 1.10 on 6d and 60d, issues are the same on both. On another note, once you set the 6d to 1/2 stops exposure level increments the in-camera flash menu is gone as Yn only supports 1/3 stops.

    • Author
      Flash Havoc 11 months ago

      Hi Marsu42,

      A few people have reported range issues with the YN-E3-RT, but they are a small minority so far.

      I think the AF light needs to be fixed, or at least returned to the smaller pattern the YN-568EX etc has, but then not everyone agrees on that either.

      I have a few issues with the build quality of the unit I have, but again the vast majority of people have been quite happy with their units.

      With the low price comes some variation in quality control etc, you can say the same thing about the YN-622. They are not for everyone, but if you were to take them all away there would be a lot of very upset people.

      So your experience and expectations are not the same as everyone’s.

      Before YongNuo released the YN-E3-RT I was getting the impression this would be a higher end product at a higher price. But it didn’t really turn out that way, and that’s not really what the majority of people want anyway. But it would be great if YongNuo would provide a premium version as well, as their engineering skills and the feature set are very desirable to many people willing to pay more for a higher build quality version as well. Thanks.

      • RDW 11 months ago

        I agree with you Flash Havoc, I think the whole purpose of Yongnuo (other than copying Canon and Nikon products) is to provide many people with knockoff products who can’t or won’t pay the higher prices for the “name brand.”. I have had no issues with my Yongnuo products and of course I expect them to be lesser build quality, otherwise, you might as well pay the full price for the “name brand.”

        I always say, “you can get a bad batch of something every now and then, no matter what is is, or who it’s made by or how much it cost”. I know for sure that Canon, Nikon, Sony, Mercedes and all the other manufactures have great products where they have a bad build every now and then, so I expect no different from this company. Now that said, if you are the one who happens to receive that product from the bad batch, it will definitely make you write a bad review and have a negative opinion of the company and/or their product. But most reputable companies will replace a bad product (withing the warranty period) with a new one.

      • David Paden 7 months ago

        My only problem with the ST-E3-RT is it quits working after 10 or 15 minutes. I can turn it off and on and it will work for another 10 or 15 minutes. Very disappointing! Everything else works great. I have not tried a range beyond 6 or 8 feet.

  14. Nez 11 months ago

    Hello, just wondering if the YN-E3-RT works with flashes driven by the YN-622C’s (ie – 430EX which doesn’t have wireless transmission without a separate trigger attached). Many thanks!

    • Author
      Flash Havoc 11 months ago

      Hi Nez,

      No, the YN-E3-RT only works with RT units. So at this stage only the Canon 600EX-RT flash (and the YN-600EX-RT when that is available). Thanks.

  15. jerome 11 months ago

    Ha, i bought it following this review, but seemed to have missed this line
    “The YN-E3-RT (and coming YN-600EX-RT flash) are not directly compatible with the YN-622C TTL triggers, or manual RF-602/603/YN-560 III systems.”

    I own 2 YN 560 III and a canon 430 ex coupled with 2 YN 622. A bit bummed yesterday when the transmitter arrived and i spent 2 hours trying to figure out why it didn’t work!

    I guess i should sell it back then.

    Is there a transmitter you could recommend for my 3 flashes by any chance?

    Many thanks, Jerome

    • Author
      Flash Havoc 10 months ago

      Hi Jerome,

      Unfortunately the 3 systems are not directly compatible. We have discussed that previously here.

      The YN-622C (and coming YN-622C-TX) can fire the YN-560 III, but no remote power control like the coming YN-560-TX should eventually provide for the YN-560 III.

      So its really a matter of choosing one system or the other. The YN-565EX II flashes would be more compatible with the YN-622-TX / YN-622C. Thanks.

      • jerome 10 months ago

        thank you!

        • Author
          Flash Havoc 10 months ago

          Thanks, no worries.

          I should also mention though, the YN-560-TX will likely stack on top of a YN-622C as transmitter. So it may be possible to fire and control those 2 systems with a little bit of a workaround there.

          Though you wouldn’t be able to stack the YN-560-TX on top of the coming YN-622C-TX, as that does not have a pass through hotshoe on top.

  16. Groundhog32 10 months ago

    I’m having the same issues as Marsu42 with the YN-E3-RT trasmitter not working farther then 2m. It’s constantly loosing a slave or all flashes and has to be reset. I you are a professional and having paying clients do not waste your time with the yongnuo trasmitter.

  17. zaakir 10 months ago

    Two month update:

    Everything is still working great with my 5D mark III. Just shot another wedding and zero issues.

    Those of you experiencing distance issues, are you doing a scan to find the strongest channel? I notice if i have this issue, then do a scan, the channel im on usually doesnt have the highest signal strength. DO A CHANNEL SCAN!!!

    All this being said, the issues with the 7D remain. Im still quite happy with the unit and it continues to work well, even the AF assist has saved me in some dark situations. as long as the center AF point can pick up the beam i have no complaints.

  18. john 9 months ago

    is this thing ever going to be able to be upgraded with a mac system?
    it says it can only be done with windows system

  19. Sebastien 8 months ago

    Hello everybody,
    the link http://www.hkyongnuo.com/e-detail.php?ID=337 doesn’t work for me. Always says:
    404 Error – File not found!

    Does it still work for anybody else? Does anyone have another official link from the manufacturer?


  20. pwp 8 months ago

    Couldn’t wait any longer for the Yongnuo 600ex-rt knock-off and dropped the Visa card on three Canon 600 EX-RT Speed lights. No regrets, they’re fantastic.

    Something I’ve read from a few Yongnuo YN-E3-RT users is the surprisingly limited range…sometimes under 5 meters. Are these one-off instances, bad copy or user error situations or is the YN-E3-RT severely distance limited? I can understand a reduced range outdoors, but is the 5m range about it? And if so, is the genuine Canon unit any better in this regard. Personally I’d be happy with either but the focus-assist is the clincher for me. With my old 580’s I used YN 622C’s purely for focus assist for dark/night event work.

  21. Paul 6 months ago

    Hi there. I have the same issue as marsu42 and others with the poor range of the yn e3. With the canon 600 rt as trigger the range is way biger.

    • Author
      Flash Havoc 6 months ago

      Hi Paul and pwp,

      It does sound like there are some somehow faulty units providing less range than others. If changing channels or using the channel reception test doesn’t help you may have to return them and try another transmitter.

      @ pwp – The Canon system generally gets around 30 meters safely as the the YN-622 etc. The can go much further with clear line of sight and no interference, but 25 – 30 meters is more around the safe general working limit.

  22. Bob 6 months ago

    Is anyone else unable to get the firmware update? I’ve had my YN-E3-RT for a few months and it has NEVER worked. The links on the site posted above on July 20th don’t work. Right now this thing is worthless. Any suggestions? I’m going to contact Amazon and see if I can return it.

  23. Pete 3 months ago

    Might be a stupid question but I cant seem to find a clear answer anywhere. I have a YN-560 II and the E3 transmitter. Is there a way to remotely fire my flash with the transmitter or do I have to upgrade to a better flash to be compatible with the E3 (if so what are my options) ? Thanks!!!!

  24. tallbamboooo 1 month ago

    I just bought a Yongnuo YN-E3-RT (firmware 1.14) and a YN600EX-RT (firmware 1.8.1), which work flawlessly on my Canon 5DIII. But I would like to use the system manually on my Fujifilm X-T1. When I put the YN-E3-RT on my X-T1 and turn on the Legacy Mode, I could transmit the M mode settings to the speedlite via the test flash button. However when I pressed the shutter butter, the speedlite would not fire.

    I have also tried to put the transmitter on another non-Canon camera, but still no luck. Then I put the transmitter back on my Canon 5DIII (still in Legacy Mode), the problem still persists. Switched off the Legacy Mode, then the transmitter worked flawlessly with the 5DIII.

    Do you think that I have a defective transmitter or was the latest firmware the culprit?

    • Kryn 1 month ago

      I did some testing on this. There may be a bug with the latest firmware (1.14), because the “Legacy” option doesn’t do anything for me either. Actually, my YN-E3-RT works on Fuji, Olympus, Nikon, Leica, and Epson, but the legacy option doesn’t seem to do what it’s supposed to. On my Nikon the Legacy option actually prevents the Canon speedlites to be fired, whereas with the option switched off, it works just fine in manual control. Try with the option switched off. It worked for my X-Pro1.

  25. Kryn 1 month ago

    The YN-E3-RT works flawlessly on a 5D2 (probably also on other Canon Cameras). It also works in manual control mode on a D800E. However, it does not seem to work on the D810, nor does it work on a Fuji S3, and it also doesn’t work an Olympus EPL5. It might be that camera settings are important, but if so, please let me know what settings to set the cameras mentioned to to make it work. I love the unit, but if I cannot use it on other cameras as advertised, then I’ll be looking at an alternative…

  26. Kryn 1 month ago

    After some investigation I found the following that could be useful to others:

    First I should state I have both the original Canon 600EX-RT and the Yongnuo variant. I used both in my testing. The firmware of the YN-E3-RT is 1.14, the firmware of the YN600EX-RT is 1.8.1.

    The YN-E3-RT has a custom Function called “Legacy”, which can be accessed by long-pressing the CFn button. The intend of this function is to allow the YN-E3-RT to be used for Non-Canon Cameras. I used this function to assess the different operation modes.

    Note that in the test cases below, only Manual mode was tested, as this is primarily a test to assess compatibility with other, non-Canon, cameras.

    Camera “Legacy” Canon 600EX-RT YN600EX-RT
    D810 Off Yes No
    D810 On Yes No
    M8.2 Off Yes No
    M8.2 On Yes No
    R-D1u Off Yes No
    R-D1 On Yes No
    X-Pro1 Off Yes No
    X-Pro1 On Yes No
    E-PL5 Off Yes No
    E-PL5 On Yes No
    5D2 Off Yes Yes
    5D2 On Yes No

    During this test I also noticed that the YN600EX-RTs had a rather long power recycle time. The YN-E3-RT has an option for setting the speedlite power output when pressing the “Test” button. The function seems to work as required when working in ETTL mode for both the Canon 600EX-RT as well as the YN600EX-RT. However, the function does not seem to work for the Canon 600EX-RT nor for the YN600EX-RT when working in Manual mode. It appears that when in manual mode, this function is disabled, and the test button assumes the power setting set on the controller for the relevant speedlite. Since the transmitter requires the user to push the “Test” button each time settings are changed (applies to both the Canon and the Yongnuo speedlites), this could cause the batteries to drain unnecessarily. Also note that since it only works in ETTL, this means you can will only have this option available with Canon cameras when shooting in ETTL.

    My conclusion is:
    1) The “Legacy” Switch is not working at all. It does not have an effect when using the YN-EX-RT in conjunction with a Canon 600EX-RT.

    2) When used with a non-Canon camera, the YN-E3-RT only triggers Canon 600EX-RT speedlites. It does NOT trigger the YN600EX-RT speedlites.

    3) The Test power option only works in ETTL, which means using a Canon Camera. In Manual mode the “Test” button will result in an output from the speedlites equivalent to the setting on the YN-E3-RT.

    • Kryn 1 month ago

      Excuse the formatting, as always with IT equipment and software it screws up formatting whatever you do. It should still be understandable though: First word/acronym is one column, second word is the next column, etc.

    • Author
      Flash Havoc 1 month ago

      Hi Kryn,

      Thanks for the details on this. This sounds like it must be a change in firmware V1.14 for the YN-E3-RT.

      You might want to let YongNuo know about your results at service@hkyongnuo.com

      I still have V1.13 installed, so I will have a closer look at how that is acting.

      I have uploaded V1.13 here if you may need that for the moment instead.

  27. Tallbamboooo 1 month ago

    Thanks very much, Kryn, for the comprehensive testing. It looks like that there is something wrong with firmware 1.14. Maybe it is for this reason they have not posted it on their website, which still has 1.13.

    Flash Havoc, are you saying that the legacy mode does work in firmware 1.13? If so, can we downgrade the firmware back to 1.13 without problem?

    • Author
      Flash Havoc 1 month ago

      Hi Tallbamboooo,

      I haven’t had a chance to test it now to be sure, but there had been no complaints previously, and I don’t recall noticing any issue.

      I don’t have a Fuji camera though to test either, which is the main one the mode was originally implemented for. Most other cameras likely do work fine with the legacy mode off anyway.

      Where are you guys getting the V1.14 firmware from then?

      Yes you should be able to revert back to 1.13, unless there is something special in 1.14 that would cause an issue now, though that is pretty unlikely.

  28. tallbamboooo 1 month ago

    Thanks, Flash Havoc. I bought my Yongnuo gear in Hong Kong last week.

    • Author
      Flash Havoc 1 month ago

      Ok thanks, I see now, you have bought the YN-E3-RT with V1.14 installed already.

      In that case it could well also be the new hardware version YongNuo have mentioned. So I’m not sure now if there could possibly be some issues that may arise from reverting back to firmware V1.13 then.

      If you’re not in any hurry to use the legacy mode it may be better to wait until YongNuo provide another firmware update to rectify the issue then.

    • Author
      Flash Havoc 1 month ago

      Ok I can confirm similar results to what Kryn reported when using V1.13 as well unfortunately.

      With the Canon 6D & 7D the YN600EX-RT will not fire with Legacy mode On. While the Canon 600EX-RT does work with Legacy mode On or Off.

      With the Nikon D7000 the YN600EX-RT will not fire with Legacy mode On or Off. While the Canon 600EX-RT does work with Legacy mode On or Off.

      With the Sony A7 the YN600EX-RT will not fire with Legacy mode On or Off. While the Canon 600EX-RT does work with Legacy mode On or Off.

      So somewhere back in the firmware this must have changed, as the Legacy mode was there to provide a solution for Fuji as they were having issues.

      • mikeyang 4 weeks ago

        Do you know if it will work with Canon 1Ds III?

  29. tallbamboooo 1 month ago

    Oh, thanks again. I am not in a hurry to use the legacy mode and so I shall wait for the next update. I am a bit disappointed as one of the main reasons for me to buy the YN-E3-RT is to use it on non-Canon cameras. The important point now is to let Yongnuo know the problem. I have already raised this problem in Yongnuo’s facebook page and have also sent an email to them. If convenient, I suggest that Kryn and Flash Havoc should also let Yongnuo know your testing results. Thank you all very much again.

  30. Brett 4 weeks ago

    Perhaps this is a stupid question, but is there any advantage to using a YN-E3-RT to control off-camera YN-600EX-RT flash units, instead of using another YN-600EX-RT? It seems like for the small difference in price, it would make more sense just to buy another flash rather than the transmitter.

  31. Andy 3 weeks ago

    I just got YN-E3-RT. The firmware version is 1.12
    It works fine with Canon 600EX-RT. There are two things i don’t really like :

    1. When i change power level on YN-E3-RT, i don’t see the level changed in Canon 600EX-RT, even though the actual power changed (i verified the exposure with pictures on different settings). So, i’m not sure if this is the way YN-E3-RT designed? or i missed something?

    2. The lock on hot hot is not tight. With Canon 600EX-RT, i can hear it click and resistance when i lock the flash, but not with YN-E3-RT ( i can lightly twist it).

    I probably return it and buy Canon ST-E3-RT.


    • Author
      Flash Havoc 3 weeks ago

      Hi Andy,

      1. No there is something wrong there. The power level change may not display on the flash straight away, though as soon as you press the test fire button or fire the camera the new power level should update on the flashes display.

      I can’t think off the top of my head how you could be having the power level change, but not display on the flash.

      2. I have one of the first version YN-E3-RT units, and yes its very loose (twisting side to side) in the camera hotshoe. I haven’t update to a later transmitter yet to test this myself, though other people appear to be indicating theirs were not so loose.

      Its only recently (since the second version YN600EX-RT flash) that YongNuo have had the neater fitting feat. Though again I have 2 early versions which are very loose, and I haven’t confirmed myself what the new foot is actually like. Or received foot width measurements from anyone to compare.

      The dial on my YN-E3-RT and YN600EX-RT flashes are completely fine so far. I think you are the first complaint on that here, though Alexander from YN622.RU has said some YongNuo owners have complained of issues with the dial.

      All in all I’ve never really had any functional issues with the YN-E3-RT, except for the fact that the range is quite limited (if you need longer range). There was meant to be an updated version YN-E3-RT along with the YN-622C and YN-622C-TX, so I’m giving it a bit of time to hopefully pick up a new model.

      If you don’t need the extra features (particularly GR group mode for pre-2012 cameras, or AF assist, or remote manual use on other cameras) then yes the Canon ST-E3-RT is a better option, particularly for the range. For $100 I find the YN-E3-RT is great on my 7D though, and now Sony A7 as well for remote manual use. And sometimes the AF light is really needed as well.

      • Andy 3 weeks ago

        Hi Flash havoc,
        1. Which mode do you set on 600EX-RT (or YN600EX-RT). i leave it ETTL on 600EX-RT. I think it acts the same way when i use PW TT1/TT5 with 580EX II. With PW, i also use AC3 to change power setting and i never see power level changed on the flash.
        So, when you change power level on your YN-E3-RT, you see power level changed in YN600EX-RT? May be Canon is different but i expect YN600EX-RT is the same. My YN600EX-RT will be delivered in a few days. I’ll test it before returning YN-E3-RT.

        One thing is i can’t download any driver/firmware from Yongnuo site. It keeps saying connection timed out. No problem in my site as i can download perfectly fine from other websites.

        2. Even though YN-E3-RT does not sit tight on the camera hot shoe, it does not go anywhere unless i twist it. So i can live with it. But if my unit is not working well, then i will need another exchange or something.

        3. About group feature, i don’t need more than 3 groups. My camera is 1Ds III and it is pre-2012 camera. If ST-E3-RT works fine with only 3 groups, i’m ok, except that no group at all.


        • Author
          Flash Havoc 3 weeks ago

          Ok the flash needs to be set to radio slave mode. Once there it shows ETTL on the display to start with, and you have no option then of changing that mode to manual on the flash itself.

          But when you set the corresponding group to manual on the YN-E3-RT transmitter, and then press the test fire button (or take a shot while the transmitter is mounted on the camera) then the flash should change to show manual mode on the display as well.

          Try doing this with the transmitter off of the camera hotshoe as well, just in case this is possibly an issue with the 1Ds III camera.

          Maybe you should try updating to V1.13 on the YN-E3-RT if you still have the issue. I’m not sure if I ever used V1.12 to see an issue like this.

          I should have V1.13 here if you haven’t found that firmware.

          Yes 3 groups are ok, its just that you can’t mix ETTL and manual groups without group mode. I don’t like the A:B C ratio in ETTL that much either. But 3 groups in manual are fine without group mode.

          • Andy 3 weeks ago

            Hi Flash Havoc,
            I’ll try again, but i doubt it works as you described. I didn’t expect RT system is complicated like that.
            I downloaded FW V1.13 here, but i still need the driver download which i couldn’t connect to Yongnuo site (timed out connection). Very frustrated with their website though


            • Andy 3 weeks ago


              I’ve just tested them again. On M mode, i can see power level changed on Canon 600EX-RT when i change it on YN-E3-RT, except E-TTL mode.

              1Ds III has max speed sync to 250. But i’ll see tiny black line when i shoot at 1/250. With 1/200, everything is fine. Based on Canon manual, 600EX-RT will have less 1 stop if used with pre-2012 camera. I thought it only happens when use 600EX-RT on camera, not wireless…confused!

              • Author
                Flash Havoc 3 weeks ago

                Thanks Andy,

                I’m not sure if they may be just an issue with your 1D IIIs or not.

                I see you have given up on the RT system though anyway.

                The YN-622C may suit your camera better.

                • Andy 3 weeks ago

                  Hi FlashHavoc,
                  There is nothing wrong with 1Ds III. The problem is 600EX-RT restricts ETTL in wireless triggering while M is fine. Also, speed sync is 1 stop lower than original sync speed. In my case, 1/250 becomes 1/125.

                  Anyway, the only way to work around is using YN-E3-RT. Unfortunately, my purpose is to use 600EX-RT on camera and trigger YN600EX-RT as the background lights. This is not working, unless i replace my camera to newer model :)

                  So, I’ll stick with YN-622C (already ordered 2 set from Amazon) and hopefully they will work well with 560TX.

  32. tomK 3 weeks ago

    I kept the one YN E3 RT unit I purchased, but now only keep it in the Emergency bag (in my auto trunk), for the following reasons …

    1. I didn’t find the AF assist light to be as affective as a Canon 600 speedlight for the times I really needed it (wedding reception dancing).

    2. When the transmitter unit breaks signal with the speed lights, both the transmitter AND the speedlight have to be rebooted to reestablish the connection. With the Canon STE3, one only needs to reboot the transmitter to require. Not sure why, and I think I have the latest firmware.

    In my main bag are two STE3’s.

    • Author
      Flash Havoc 3 weeks ago

      Hi Tom,

      That’s interesting. I haven’t really had to reboot anything to regain a link connection. Usually moving closer to the slave flash restores the link eventually, and its usually restored by the time I reach a slave flash anyway.

      I guess it would help to just switch the transmitter on and off to regain the link without moving position. The other thing I do in this case is to use the auto channel and just do another channel scan. And that generally restores the link again.

      The YN-E3-RT’s limited range is also part of the issue here. I don’t know if that has improved with the latest model though.

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