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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 26 Nov 2017 (Sunday) 14:04
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Do I need a flash transmitter?

 
wantafastbusa
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Nov 26, 2017 14:04 |  #1

I have a Canon 80d, and Godox tt685c. I've heard the flash can be used off camera without one, but I'm skeptical. I can't seem to get them to see each other. Am I better off just getting a godox x1 transmitter? Thanks in advance.


Canon 80d
50mm 1.8
24-105mm f4 L
70-200mm f2.8 L IS2
10-18mm f4.5-5.6
godox TT685

  
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Wilt
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Nov 26, 2017 14:54 |  #2

Both the 80D and the Godox TT685c use the optical encoded signal to communicate wirelessly for flash control; they do not use the radio wave signal.


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Nov 26, 2017 15:00 |  #3

Should look at the newest xpro rather than the older x1


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bobbyz
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Nov 26, 2017 15:16 |  #4

Wilt wrote in post #18504561 (external link)
Both the 80D and the Godox TT685c use the optical encoded signal to communicate wirelessly for flash control; they do not use the radio wave signal.

Godox has the built in 2.4GHz Rx from what I know, just buy X1-C for $50 and it should work.


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Jarvis ­ Creative ­ Studios
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Nov 26, 2017 15:21 |  #5

I don't know who you heard that from. I think you need a controller on camera for the flash, however you should not need any trigger on your flash.


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MalVeauX
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Nov 26, 2017 15:26 |  #6

wantafastbusa wrote in post #18504524 (external link)
I have a Canon 80d, and Godox tt685c. I've heard the flash can be used off camera without one, but I'm skeptical. I can't seem to get them to see each other. Am I better off just getting a godox x1 transmitter? Thanks in advance.

Did you set it as an optical slave? It should trip from any pulse of light (like your 80D's flash) if set as an optical slave.

Very best,


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soeren
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Nov 26, 2017 15:49 |  #7

As far as I know the flash can be controlled optically or by 2,4Ghz from another Godox flash on camera or by the radio trigger(radio not optically)with full power- and HSS control or via the S1 and S2 modes just firing the flash. It can not be controlled through the canon system alone or Nikon for that matter without a Godox trigger/masterflash




  
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wantafastbusa
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Post edited 7 months ago by wantafastbusa.
     
Nov 26, 2017 17:43 |  #8

MalVeauX wrote in post #18504580 (external link)
Did you set it as an optical slave? It should trip from any pulse of light (like your 80D's flash) if set as an optical slave.

Very best,

I did slave with a lightning bolt next to it, and slave with what looks to be as an antenna. I was under the impression when buying it I would work wirelessly but apparently I'm wrong, since I can't get it to talk to the camera unless it is mounted. Finding literature or youtube videos for my specific camera has been difficult. Thanks for all the replies so far though guys.


IMAGE: http://www.godox.com/EN/images/Products_TT685C_02.jpg

Canon 80d
50mm 1.8
24-105mm f4 L
70-200mm f2.8 L IS2
10-18mm f4.5-5.6
godox TT685

  
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wantafastbusa
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Nov 26, 2017 17:48 |  #9

Wilt wrote in post #18504561 (external link)
Both the 80D and the Godox TT685c use the optical encoded signal to communicate wirelessly for flash control; they do not use the radio wave signal.

The flash does support wireless signal along with optical. I'm just not sure if the camera does.

Just out of curiousity, why does the camera offer different channels and firing groups? Is it able to detect or signal optically which flash it wants to? This is all new to me, sorry for the noob questions.


Canon 80d
50mm 1.8
24-105mm f4 L
70-200mm f2.8 L IS2
10-18mm f4.5-5.6
godox TT685

  
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wantafastbusa
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Post edited 7 months ago by wantafastbusa.
     
Nov 26, 2017 18:05 |  #10

MalVeauX wrote in post #18504580 (external link)
Did you set it as an optical slave? It should trip from any pulse of light (like your 80D's flash) if set as an optical slave.

Very best,

Finally got it going! Apparently lightning bolt symbol is optical. Now I need to test what kind of range I can get away with.

The camera also has a wireless option for flash, but does not detect the godox. Does anyone know if I have to have a proprietary canon flash for this to happen?


Canon 80d
50mm 1.8
24-105mm f4 L
70-200mm f2.8 L IS2
10-18mm f4.5-5.6
godox TT685

  
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Wilt
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Post edited 7 months ago by Wilt. (4 edits in all)
     
Nov 26, 2017 18:20 |  #11

wantafastbusa wrote in post #18504680 (external link)
The flash does support wireless signal along with optical. I'm just not sure if the camera does.

Just out of curiousity, why does the camera offer different channels and firing groups? Is it able to detect or signal optically which flash it wants to? This is all new to me, sorry for the noob questions.

685C is the Canon-compatible version
Transmission range: Optic: Indoors: 12 to 15m /39.4 to 49.2 ft.; outdoors 26.2 to 32.8 ft_


Master unit reception angle: ±40° horizontally±30° vertically, 2.4G: 100m
Channels: Optic: 4 (1,2,3,and 4)

2.4G radio: 32(1-32)

My earlier reply was to let you know that the COMBINATION of 80D and 685C uses the optical encoded wireless, so you buy nothing.
Radio requires you to buy a transmitter unit from Godox.

It sounds like you need to get yourself an electronic copy of the user manual, as the information I provided above was taken directly from there.

You set channel so as to avoid interference from someone else's camera who is shooting in the same room as you.
You set groups so that you can be selective about which flash units fire, such as at different locations in the room.


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wantafastbusa
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Post edited 7 months ago by wantafastbusa.
     
Nov 26, 2017 19:06 |  #12

Wilt wrote in post #18504702 (external link)
685C is the Canon-compatible version
Transmission range: Optic: Indoors: 12 to 15m /39.4 to 49.2 ft.; outdoors 26.2 to 32.8 ft_


Master unit reception angle: ±40° horizontally±30° vertically, 2.4G: 100m
Channels: Optic: 4 (1,2,3,and 4)

2.4G radio: 32(1-32)

My earlier reply was to let you know that the COMBINATION of 80D and 685C uses the optical encoded wireless, so you buy nothing.
Radio requires you to buy a transmitter unit from Godox.

It sounds like you need to get yourself an electronic copy of the user manual, as the information I provided above was taken directly from there.

You set channel so as to avoid interference from someone else's camera who is shooting in the same room as you.
You set groups so that you can be selective about which flash units fire, such as at different locations in the room.

Gotcha, well I have it working optically, but it definately does not want to talk to each other wirelessly. I'm conflicted on buying a godox trigger, or selling this and getting a canon compatible flash(one less thing hanging off the camera). Thanks for all the help everyone.


Canon 80d
50mm 1.8
24-105mm f4 L
70-200mm f2.8 L IS2
10-18mm f4.5-5.6
godox TT685

  
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MalVeauX
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Post edited 7 months ago by MalVeauX. (2 edits in all)
     
Nov 26, 2017 21:19 |  #13

wantafastbusa wrote in post #18504693 (external link)
Finally got it going! Apparently lightning bolt symbol is optical. Now I need to test what kind of range I can get away with.

The camera also has a wireless option for flash, but does not detect the godox. Does anyone know if I have to have a proprietary canon flash for this to happen?

The Canon will use it's own proprietary stuff. It won't talk to that Godox without a transmitter.

But as you see, you can trigger it with old school optical slave and it will work fine, no matter if it's from a Canon or another source.

**********

You could sell this flash and buy a Canon flash and spend over twice what you will sell this for (and that's buying used!).
Or you can send $40 and get an R2 transmitter that will talk to that flash, and all future R2 system flashes, control groups, control multi-flash setups, etc.
And you will not gain much of anything by getting that Canon flash as an alternative.
I would just build around the R2 system. It's quite good.

Very best,


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agv8or
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Nov 26, 2017 21:34 |  #14

wantafastbusa wrote in post #18504743 (external link)
Gotcha, well I have it working optically, but it definately does not want to talk to each other wirelessly. I'm conflicted on buying a godox trigger, or selling this and getting a canon compatible flash(one less thing hanging off the camera). Thanks for all the help everyone.

You stated your TT685 was Canon compatible as that is what the little c is after the TT685c. The 80D does not have the ability to communicate wirelessly via radio without having a radio trigger attached. It can only transmit wirelessly via optical using the pop up flash. In this regard when using the 80D in a wireless setup, without the use of a radio transmitter, the TT685 is going to be the same as any other Canon or Canon compatible flash in that it can only be used in the Wireless Optical Slave configuration (see the image below). Follow the instructions in this link ( https://www.youtube.co​m/watch?v=2mvJ5dRPYhY (external link) ) to setup your 80D.

Like most people you'll probably find that the Wireless Optical system is very limiting especially when trying to use it out doors so save your self the frustration and buy an Godox XPro transmitter.


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bobbyz
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Nov 26, 2017 22:02 |  #15

Not sure why make life hard. Spend $50, get the X1C trigger and be happy.


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Do I need a flash transmitter?
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