GODOX – TT685C – TTL Radio Speedlite – Now Available

Godox TT685C


Godox have released the TT685C speedlite for Canon, a fully featured TTL and HSS enabled flash unit with 2.4GHz radio receiver built inside.

The TT685C are also available from Adorama as the Flashpoint Zoom TTL R2 for Canon.




The TT685C provide Godox 2.4GHz X System Radio Master and Slave modes.

The Radio Master mode can fire and control the complete Godox 2.4GHz Flash System, including cross compatibility with Godox 2.4GHz slave strobes for Canon, Nikon, Sony, M4/3, and Fuji.

An auto sensing Radio Slave mode can also be fired and controlled by Godox 2.4GHz Master flashes and Transmitters for Canon, Nikon, Sony, M4/3, and Fuji.

All with TTL and HSS available across platforms where applicable.


NOTE – Godox flashes purchased before July 2017 may also require a user installed firmware update to add the Olympus / Panasonic, and Fuji, radio slave modes (at least for TTL use).




A large dot matrix LCD display provides easy access to the master interface and functions.

5 slave groups are provided – A / B / C / D / E

And remote groups can be mixed, with TTL and Remote Manual Groups used at the same time, while individual groups can also be turned On and Off easily as needed.

(NOTE – There is no GR Mode with pre 2012 Canon Cameras – So only 3 Groups available then, and no mixed TTL & Manual)




As well as acting as their own master flash on-camera, the TT685C are also compatible with the new Godox X1-C TTL transmitter and receivers.

An X1T-C transmitter mounted on the camera hotshoe can control a number of remote TT685C speedlights off camera.

While original Canon Speedlites like the 580EX II, 600EX-RT etc can be included in the system by attaching X1R-NC receivers to their feet.


Godox X1-C




  • GN 60 (m ISO 100)
  • Powered by 4 x AA batteries
  • HSS to 1/8000th
  • Flash Mode – ETTL /M / Multi
  • 1st Curtain Sync / 2nd Curtain Sync
  • FEC / FEB – 1/3rd Increments (±3 stops)
  • Manual Flash – 1/128 – 1/1 output control (1/3rd increments)
  • Flash Zoom 20 – 200mm
  • Radio Master & Slave Modes for Godox 2.4GHz X Radio System
  • Godox – Canon / Nikon / Sony / M4/3 / Fuji – TTL Radio Slave Modes
  • Mater Groups A / B / C / D / E  (In GR Mode – Requires 2012 Onwards Cameras)
  • Slave Groups A / B / C / D / E
  • 32 Channels
  • Range to 100 m
  • Compatible with Godox XTR-16s / FTR-16s Receiver
  • Optic Master & Slave Modes for Canon Optic Wireless System
  • 3 Remote Groups A / B / C
  • 4 Channels
  • Range – Line of Sight
  • S1 and S2 Optic Slave Modes
  • Recycle Time: 2.6 Seconds at full power
  • Full 360 Degree Swivel, and Tilt Head
  • Large Dot Matrix LCD Screen
  • AF Assist Light
  • Foot Clamping Ring with Locking Pin
  • Sound Prompt
  • Custom Functions
  • Settings Memory
  • Overheat Protection
  • USB Port for Firmware Updates
  • Communication Port (For XTR-16s / FTR-16s Receivers)
  • 2.5mm Sync Port
  • External High Voltage Battery Port



Although resembling the recent Godox V850 and V860 speedlites, the TT685C feature a larger Dot Matrix LCD display with on screen menu options. As well as fully back-lit function buttons, including extra Link and Mode buttons.

More significantly though, instead of Lithium-ion power, Godox have chosen to start with a more traditional 4 x AA battery powered unit. With the option of connecting an external High Voltage Battery Pack for faster recycle times etc.

(Lithium-ion powered V860II-C are also now available).




The TT685C provide a 3.5mm Sync Port, and USB Port for firmware updates.

As well as a 4 pin Communication Port which provides backward compatibility with Godox’s remote manual XTR-16s / FTR-16s clip-on radio receivers (also used with the original V850 and V860 speedlites).




A High Voltage External Battery Port is provided at the front of the flash, for connecting external battery packs like Godox’s popular PB960, or other Canon compatible packs.




Brand Godox
Model TT685C
color Black
Max. Recycle Time 2.6 seconds at full power
Guide Number(m ISO 100) 60M
Color Temperature 5600K±200K
Wireless flash function Master,Slave,S1,S2
Battery AA*4
Power input support
Multi Mode Frequency 1 to 199Hz and Times 2 to 100
Flash Duration 1/300 to 1/20000 second
Flash Coverage Manual zoom from 20 to 200mm
Controllable slave groups 3 (A, B, and C)
Compatible Cameras Canon EOS DSLR(E-TTL II)
Size 64 *76*190 mm
Weight 410g





The Godox TT685C speedlites for Canon are available now from around $119 –



Godox – Website.


  1. Shlomi Cohen 5 years ago

    Wolf- go to Manual mode , and then one of the menu buttons would change to s1/s2.

  2. Wolf Dieter 5 years ago

    Thank you Shlomi!

  3. Matt Williams 5 years ago

    Hey Folks,

    I am only slightly familiar with Godox,but they seem to be the best bang for their buck. Just got the TT685C on my 6D. I am having trouble with the AF Assist beam. Can’t seem to get it going. Thoughts?

    • Author
      Flash Havoc 5 years ago

      Hi Matt,

      You don’t have the camera set to AI Servo focus mode by any chance? Because the AF assist is disabled in AI Servo mode.

  4. nixland 5 years ago

    When I use it as slave, the group option only A, B and C. How to activate group D and E ?

    • Author
      Flash Havoc 5 years ago

      Hi nixland,

      Sorry I’m not sure as I don’t have the TT685C here at the moment.

      Godox have made it very confusing just now, as the V860II-C have been updated to include Nikon and Sony radio slave modes etc, while the TT685C have not been yet.

      If you can see the 5 radio slave group in your V860II-C, then they must not have been implemented in the TT685C yet.

    • Mike Catuara 4 years ago

      You can only use the D & E groups manually if you have the X1Tc Trigger on top of your camera and X1R Receivers under your flashes. If you have the X1Tc, follow the custom function menu and go to FN7 and change from 03 to 05.


  5. jim 5 years ago

    Whats the af assist beam like on this? I use a flash a lot in niteclub work. The canon 5802 has served me well, but need to upgrade and the canon 600 ex is a bit pricey for me at the moment.

    • Author
      Flash Havoc 5 years ago

      Hi Jim,

      The TT685C use a similar lazer style AF light to most current third party flashes from YongNuo etc. They are definitely better than nothing, though depending on zoom length etc its easy for focus points to fall completely between the projected lines.

  6. Mumin 5 years ago

    Hi,i have godox tt685c and godox ad600bm, i use them with x1t-c with no problem with canon.i also want to use them with my fujifilmx100f,as i know the new 2.4ghz godox xt16 have the single pin.if i buy one of them,will i need receiver units ft16r and ft16r-s for the tt685c and the ad600bm or they already have built in 2.4ghz receivers ,the xt16 will trigger them without receivers clipped on them?thank you very much

  7. jay 5 years ago

    does the x1 transmitter capable for HSS? or does it need cells?

  8. Oscar 5 years ago

    I´m having a E5 error on TT685C . How can i fix . Whenever i turn on it shows E5 on the screen and i cannot not do anything.

    • capsi 5 years ago

      @Oscar – I have the same issue and I cannot seem to find anything about it from the manual nor online. Can anyone else in this forum shed some light on what to try?!

      • stefano 4 years ago

        @oscar @capsi I have encountered E5 error on my Flashpoint Zoom TTL for Sony (TT685) , new. I just used it as a remote, happened after a few shots.

        Any updates? I am worrying about the reliability of these flashes.

    • Al 4 years ago

      Any solution for e5 error?

  9. Thanasis 5 years ago

    I have Godox V850 with FT-16 Transmitter and FTR-16s Receiver and i bought Godox TT685c for my 6D.
    Is it posible to set TT865 as master and V850 as slave without my YN-622c Transceiver;

  10. Al 4 years ago

    Any solution for e5 error on TT685C with new update?
    I’m about to get this flash but worry about this error.

  11. Peter Mohr 4 years ago

    Does anyone have experience with this flash and the Canon 80 D – your feedback is much appreciated!

  12. jim 4 years ago

    I guess no one found a solution to the e5 problem.

  13. Kurt 4 years ago

    I recently purchased the new Canon 6D mark II.
    I get an AI Bounce message on my camera whenever I try to use the tt685 on camera or off camera with the X1 transmitter.
    I never had this issue with my old 6D.
    Google search did not get me any info on what AI Bounce means?
    Does anyone have any idea?

    • Jason 4 years ago

      Hi Kurt I had the same message pop up on the 6Dmkii with a yongnuo yn-e3-rt triggering two canon 600ex-rt flashes, but doesn’t show on my 6d or new 5dmkiv so looking forward to a answer 🙂

  14. Matt 4 years ago

    Any idea if it’s possible for the red lights to stop blinking when the flash is in slave mode? It’s very distracting. (I’m not referring to the AF assist light)

    • Author
      Flash Havoc 4 years ago

      Hi Matt,

      I don’t know why manufacturers continue with the slave indicator lights, though, the only way to stop them is using a piece of gaffa tape 🙂

  15. David 4 years ago

    Anyone figure out that e5 problem problem?

  16. Eduardo 4 years ago

    Can the TT685 or v860II trigger a slave v860 with xtr-16 attached?

  17. Steve McWilliam 4 years ago

    Can the X1T-C trigger a Canon 600EX II RT flash without adding a receiver on the base of the flash (i.e. is the X1 transmitter radio signal directly compatible with the in-built receiver in the 600EX II RT ??).

    Many thanks.

  18. Nathaniel 4 years ago

    I am trying to trigger my TT685Cs as optical slaves. Nothing seems to work. Are these flashes work as true optical slaves or is do they only work within a flash system. I want to fire them in the studio using a strobe (Profoto) as the flash source. Nothing I do works. Have I been duped? Is there anyway to do this? I currently have the older Rovelights and they pop when set to slave from the Profoto, but the Godox refuse to fire.


    • Author
      Flash Havoc 4 years ago

      Hi Nathaniel,

      Do you have the flash set to S1 or S2 optic slave mode? That’s what you need to do to have them fire as a basic optic slave to another flash.

      If you put the flash in regular Manual mode you will see the S1/S2 button option in the menu bar at the bottom of the LCD screen. S1 is used for regular strobes as the trigger source (S2 ignores a TTL pre-flash).

  19. Malik 4 years ago

    I am facing the e1 on tt685,how could i fix it or what’s the reason

    • Jennifer 2 years ago

      I am too. Just now today. I wanted to try a trigger, turned on my flash and now I’m worried. Have you found out anything?


    Hi trying a firmware update on my tt685c i forgot batteries inside and the firmware failed after that the flash won’t open… does anyone know a way to fix.. or reinstalling an older firmware…plz help!


      i tried to upgrade 2-3 times and then the update completed. problem solved

  21. Robert T Johnson 3 years ago

    I’ve posted a youtube.com video on my channel on how to diy an extension cord for the godox pb-960 battery pack for under $25. This extension cord uses an oem godox 15 feet cord, the video can be found here: https://youtu.be/yjAAXJWUnCM

  22. Danel 3 years ago

    Hello Flash Havoc,

    Thanks for amazing articles and an outlet like this. It’s really helped me out.

    I’ve had my TT600 and X1T-N for a while now and just got my Flashpoint Zoom. I have one concern and hopefully you can assist those like me who want this feature. I hate that there is no way, either in master or normal operations to turn off the flash or prevent it from firing. I have that feature on my TT600 which is nice but I imagine situations where a nice silhouette would be preferred but removing the Zoom R2 for the X1T-N would be too much hassle.

    If it is available maybe you can help me out, otherwise I think you might have the clout to suggest that to Godox and/or Adorama.

    Thanks much

  23. Alan 2 years ago

    Are the godox 685s compatible with the Canon 5D mk4

    • John Wilson 2 years ago

      The 685S is the Sony version. It won’t work in a Canon hot shoe but will work off camera if triggered by a Canon compatible device (e.g. the XPro-C , X1-C or any Canon compatible Godox speedlight)

  24. Teshan 2 years ago

    Hello Flash Havoc. I was just wondering if a TT685 for canon works on the 80D. It keeps telling me, “Incompatible external flash, or flash turned off” when i try to sync it with my camera settings. The flash firing is already set to ‘enable’, but it still can’t work. Any help please

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