YongNuo YN-622C/YN-622C-TX Controller Triggers 2

PS - Camera set to
1/160
F4.5
ISO 100
M flash mode
One Shot.

Setting Gp A to Manual on the C-TX forces the camera into M flash mode.

BTW - the aperture displayed on the flash is simply repeating the setting of your camera: it does prove that communication is established.

This may or may not be relevant. I have five 622Cs and only one, a recent purchase as a pair, will work with my 380EX. The other member of the pair, including the three older ones, won't work consistently with that flash. With the other four, I get either a weak flash or a full dump. The one "special" unit works as expected with either a 622C or TX as controller for the 380EX.

I do know this behavior is indicative of a poor connection. I've tried all the recommended "fixes" but to no avail. All the units work as advertised with my 580EX II, 430EX II, and YN568EX flashes. If salinas272 has multiple 622s, perhaps test each one for proper operation with the 550EX.

Edit: Within the last hour, for giggles, I mounted an old 622C on my 380EX and took a perfect picture, using both E-TTL and manual. I then shut everything off, came back a few minutes later, turned everything on and got the preflash visible in the viewfinder but a black frame. I hadn't dismantled anything; just turned the units on.

Seems it doesn't like having more than one group.
By turning off group B/C the flash control works. If i have any setting showing in B/C then it also affects A.
Unfortunate, but at least i have some control which is better than nothing.
Thanks for taking the time to help troubleshoot.

I have the same issue like salinas272 with my 10 years old 550EX (I), 70D and new 2x622C (not TX). I have found that 550EX works only when Group A+B+C selected on transmitter or in camera (also, when wireless mode disabled). In that case, 550EX works in any group, selected on receiver. But with Group A:B or A:B C settings it fire only when receiver is in Group A. The flash do not fire when I press pilot button and the receiver in B or C group. After I made power cycle on flash, pilot button works again.
So, I think there is some error in communication protocol that freezes the flash in B or C group (mixed mode enabled on transmitter)
I also have 430EX II and 270EX II that both works fine with any settings.

kubik wrote in post #17385503
new 2x622C (not TX). I have found that 550EX works only when Group A+B+C selected on transmitter or in camera (also, when wireless mode disabled). In that case, 550EX works in any group, selected on receiver.

That is how it is with the 622C.

The 622C-TX has an extra capability - setting a 550EX output remotely, by group.

See page 45 of TOYUG pdf.

salinas272 wrote in post #17380073
Seems it doesn't like having more than one group.
By turning off group B/C the flash control works. If i have any setting showing in B/C then it also affects A.

I have just checked - A = 550EX in E-TTL; B = 568EX in Manual. Both fully controllable independently in Manual mode.

A look at the camera menu shows that the C-TX has set the camera to wireless-enabled; firing groups=A:B; and A and B follow the various output settings on the C-TX. The actual images show that lighting is as expected.

BTW, before a test, I always CLEAR to ensure no special settings are active. I am sure that there is some factor involved that I am missing.

CliveyBoy wrote in post #17386024
That is how it is with the 622C.

The 622C-TX has an extra capability - setting a 550EX output remotely, by group.

I do not need 550EX in manual, but I need it in TTL in group B in mode A:B or A:B C. How I can do it with 622C or 622C-TX?

kubik wrote in post #17386873
I do not need 550EX in manual, but I need it in TTL in group B in mode A:B or A:B C. How I can do it with 622C or 622C-TX?

"Setting an output" always means Manual mode. The 550EX handles E-TTL just as Canon designed: it's remote control of Manual outputs that presents a problem. (See p.15 of TPYUG.)

With the 622C, just use standard Canon procecdures through the camera menus. (TOYUG does not discuss using Canon protocols as it is assumed that a Canon user will already have mastered those procedures.)

The C-TX can also be used, instead of the camera menus. This frees the user from the Canon constraints of ABC, A:B and A:B C. Under their rules, A and B are always ON, and only one flash mode can be used at a time, over all groups.

Why you not described in your TOYUG that 550EX and other old speedlites can only works in group A with 622C (in mode A:B or A:B C) and in any groups with TX but in manual? Since 550EX in class 2 flashes, this means it should be compatible with TTL and works in any groups, in any modes, but without remote control for modes. This is important compatibility issue for 550EX owners.
And one more issue... When 550EX mounted off camera on 622C, it switches to Master mode when I half-press shutter button. I can see it on its LCD. Why? I think, transmitter send wrong codes to flash. My 622C date code is 12 2014.

Instead of using 550EX with 622C or TX, I will use it in native wireless optical mode, as master, with all my other flashes, where possible, where 550EX works as designed.

kubik wrote in post #17387678
Why you not described in your TOYUG that 550EX and other old speedlites can only works in group A with 622C (in mode A:B or A:B C) and in any groups with TX but in manual? Since 550EX in class 2 flashes, this means it should be compatible with TTL and works in any groups, in any modes, but without remote control for modes. This is important compatibility issue for 550EX owners.

It's not there because it is not true, and I have again tested your assertions.

The 550EX CAN BE USED with the 622C in E-TTL mode whether in group A or B or C. It can also be used in Manual mode for triggering, but most settings must be made on the flash.

The 550EX CAN BE USED with the 622C_TX in E-TTL mode whether in group A or B or C It can also be used in Manual mode with C.Fn 05=ON for both triggering and for setting levels.

kubik wrote in post #17387678
When 550EX mounted off camera on 622C, it switches to Master mode when I half-press shutter button. I can see it on its LCD. Why? I think, transmitter send wrong codes to flash.

The 550EX Master/Slave mode is set by the three-position switch. It should be OFF, The LCD display of the standalone/master/slav​e state is not set by the 622C or the 622C-TX. "Master" will be displayed if the mechanical switch is set to Master: it should be OFF.

The only settings required on the 550EX when used with the 622C-TX is Master/Slave=OFF, and flash mode=ETTL. All other settings should be made on the C-TX. Not even on the camera flash control menus. Note that you CANNOT SET A:B or A:B C as such on the C-TX. You can of course set group A and/or B and/or C independently to E-TTL, Manual, Multi or OFF. This is where the 622C-TX departs from Canon limitations in favour of quicker and more versatile control.

kubik wrote in post #17387678
Instead of using 550EX with 622C or TX, I will use it in native wireless optical mode, as master, with all my other flashes, where possible, where 550EX works as designed.

There are many scenarious that work, and some that have a propagation delay. I am sure that once you identified the problem, you would find pleasure in the versatility that the 622C system provides, despite its frustrations. Of course, you may have found a problem that I have neither seen nor read about. Further information would be helpful.

FlashHavoc has news this morning on a new YN product. Appears to be a 600 EX RT compatible RECEIVER unit for integrating non-RT flashes with the 600 RT system:

http://flashhavoc.com …e3-rx-receiver-announced/

Sounds to me (a rookie at best) that this is a parallel product line to the 622 TX and 622C setup, but for those who went down the 600 RT lane and now want to bring in less expensive flashes into their inventory.

PS - I just noticed that a thread started about this new product yesterday: https://photography-on-the.net …/showthread.php​?t=1415684

Speculation questions - Will YN try and replace the 622 system with the 600 EX TX RT system? Can they exist in parallel? Do they compete with each other? And the REAL question, will CliveyBoy develop a completely new TOYUG for the 600 system, or add new chapters to the existing manual?

CliveyBoy wrote in post #17387763
It's not there because it is not true, and I have again tested your assertions.

The 550EX CAN BE USED with the 622C in E-TTL mode whether in group A or B or C. It can also be used in Manual mode for triggering, but most settings must be made on the flash.

The 550EX CAN BE USED with the 622C_TX in E-TTL mode whether in group A or B or C It can also be used in Manual mode with C.Fn 05=ON for both triggering and for setting levels.

I just checked again, after made reset on 622C. I setup 550EX off camera in group B(slave/master=off), and 430EX II on camera in 622C hotshoe, mode A:B, mixed mode=on. 550EX fires about 1 times in 10. And it fires without pre-flash and with full power (image overexposed). When I switched to mode A+B+C, 550EX started works with every shutter release with pre-flash and normal exposure.
So, I think, there are several 550EX versions, my is very old, user salinas272's very old too, and your not very old. I don't know, where I can confirm about different versions, but it may be the only reason, why my 550EX doesn't works with 622C and groups. If you can find somewhere older 550EX that your, you may test it and change your mind.

I just found strange behavior. In my setup, when 430EX II is in hotshoe of 622C, on camera (mode A:B), off camera 550EX doesn't fire in group B. But when I removed 430EX II from hotshoe, 550EX II starting to fire! I checked this many times, and this behavior confirmed again and again.
CliveyBoy, since you too have 430EX II, please check my setup on your flashes and 622C.

hey everyone.. im about to purchase another set of 622c triggers to up my flash usage to 6 when venues are that huge and need of light.
i use these triggers and flashes only in manual 100% of the time. I know the triggers and my current flashes are working perfectly.

i own the 580exII, 430exII and 2-yn560I.. one function that i do love is controlling the flashes from the cam which i cant do with the yn560I. I need to know if the y560II - III and IV work with the the 622cs with no problem as far as off camera control goes. If not, i can still get yn560I since there are a few out there still and avoid headaches...

thx

To kubic... First, an apology: I was still thinking of the C-TX that Salinas had, and failed to read your posts carefully. So, starting again:

No – he is talking about the C-TX; its behaviours are different.

How do you do that? Are you mistakenly setting the test firing selection?

I suspect user error. I have tested a 550EX on Gp A and another on Gp B, and ratios work exactly as per Canon rules. The remote 622Cs are in Remote mode, on Ch 1 and Gp A and B. The 550s are in standalone mode and E-TTL mode; all other settings are made by the 622C.

The 622C is not involved in firing using the flash pilot button. I can fire the flash using the Pilot button while it is sitting on a 622C in Gp B. There is some other problem in effect.

No, no. no – Remote mode is required! Note that Clear/Reset does not change the Remote/Mix mode setting.

Those flashes are manufactured with significantly different hardware and firmware. Canon built in wider control methods.

NOT “TTL” In Canon that acronym stands for the technique of a light sensor in the film camera reading reflected light from the film plane. If that is the flash mode displayed on the flash LCD, is will give a full dump as there is no film or sensor to turn the light off earlier. It indicates a faulty contact!

E-TTL works just fine with the 550EX. Of course, Canon has some problems if there is no flash functioning in group A as well as B. What is the numeric ratio of “no added light” to “some added light”?

Oh but they do, if set up correctly.

It has remote control in E-TTL – FEC! It is only in Manual flash mode that the control paths are not provided by Canon.

The 622C does not control in any way the setting of the manual switch for Off/Master/Slave. How can it? The switch does not have a servo motor.

Of course, if that path suits you. Remember that the 550EX is a legacy (1997) flash, and largely superceded.

Turn Mix Mode to OFF. Do not make settings on the flash, other than standalone and EC-TTL! Use the camera’s menus.

Most common cause – poor contacts. In fact I accidentally reproduced a similar problem – the flash had no been fully inserted into the 622C hotshoe. The rear pins were largely visible: they should not be. Design/manufacturing/t​olerance variations are a universal cause of failure.

My 3x 550EXs were bought 2003 to 2005, serial numbers OR0715, 0915 and 1115. Quite old enough to discount this theory.

Sorry, I had no problem using 430EX II on top of camera and 550EX on 622C in Gp B in ETTL, with full ratio and FEC control. Your swapping around strongly suggests contact problems being introduced and removed – a common experience.