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I am trying to control two off-camera flashes with my Canon 5D Mark III. The first flash is a Profoto B1. The other flash is a YN600EX-RT speedlight mounted on a Yongnuo YN622C II transceiver unit.

On my camera's hotshoe, I have mounted another YN622C II transceiver (to control the Yongnuo flash + YN622C II combo); on top of its pass-through hotshoe, I have mounted a Profoto AirRemote TTL-C controller (to control the Profoto B1 flash).

When I try full TTL, the Yongnuo flash seems exposed correctly, but the Profoto B1 is way overexposed. I tried setting the AirRemote TTL-C to go manual, but it keeps getting reset to TTL. I tried underexposing the B1 flash using the AirRemote TTL-C, but it keeps getting reset to full TTL and full power.

Has anyone else seen this, or have a clue what I am doing wrong?

  • What are your camera's "Flash control" settings? – scottbb Apr 20 '16 at 3:47
  • Not a duplicate, but this question is similar (different trigger mounted on top of the older YN-622C). The comments and answers might help you figure out if this can be done, and if so, how: Can the YN-E3-RT be used, mounted on top of the YN-622C? – scottbb Apr 20 '16 at 3:49
  • Can you assign the Profoto B1 transmitter to a different group than the YN622C II/YN600EX-RT? – Michael C Apr 20 '16 at 6:19
  • Do you have HSS turned on? rwong2k.blogspot.com/2015/07/… – inkista Apr 20 '16 at 15:10
  • Camera flash settings - flash firing enabled, e-ttl ii meter evaluative, flash sync speed in av mode auto (i was shooting manual), ettl, wireless optical, high speed sync, ch. 1, master flash firing, all groups. hss was turned on for the profoto b1. I'll try using different groups/channels. I assumed (trouble) they transmitted on different frequencies and wouldn't matter. Thanks for the responses! – shtarker Apr 20 '16 at 23:02
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I would in this case, mount the Yongnuo trigger on the camera to fire the speedlight.

Go grab an optical trigger and attach it to the Profoto. If you need an extension cable to make it fire, then try that.

You will have to control the B1 manually.

Or, toss the Yongnuo and get another Profoto light so you have a uniform system that can be controlled with one control unit at camera.

Profoto B10 off camera flash

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