Has anyone used (or have available to test) the Yongnuo YN-622-TX (like a su-800) and the YN-622 receivers with the DF? I am getting the flash to trigger but mega under powered flash. It seems the DF shutter is firing late after the flash,miss that possible? Worse, the DF is snapping two frames. I have never seen this before and do not have bracket turned on. Yongnuo does not list the DF as compatible, but when I asked them they said they just never tested with the DF.
If I know someone has gotten it to work, I will keep trying!
More experimenting, the weird double shutter happens when the flash does not have enough power to get a good exposure (like I am shooting away from the flash field of light). When I shoot a more normal composition, only one shutter. But still a very odd experience that the flash somehow impacts the shutter release?
On the significant underexposing, I have now read that this is a known issue with these units in TTL mode, and adding 1.3 - 1.7 of flash exp is working for now.
I don't shoot a ton of flash, but want a reliable setup when needed.
As a side, I found some posts where people us the Yongnuo flash controller specifically for the AF Assist (red laser lights) to help the DF focus in low light.
Cheers,
Rob.