Lyndön wrote in post #18336223
This may be a silly question, but one I haven't been able to find the answer to yet.
I currently have an R2 transmitter and R2 receiver for Canon, along with the Xplor600. I just bought an Olympus OM-D which is supposed to have an R2 transmitter released soon (they already have an Olympus compatible R2 speedlite available for preorder).
The TT350-O can actually be used as an R2 transmitter. You won't have TTL, tho, until the AD600's firmware is updated to grok the Olympus X1 signalling. Not sure about HSS. Eventually, the X1T-O will be released, and it's likely the firmware updates will come out around that time.
Is there a way to use the Canon receiver to fire a Canon flash from the Olympus transmitter? Obviously it would have to be in manual mode and no TTL info would be communicated.
Just me, but you might just try using your Canon gear on the Oly hotshoe. I use my Canon YN-622 gear on my Panasonic GX-7, and while I don't have TTL/HSS, I do have sync and manual power control. I'd guess that the R2/X1 gear would function similarly.
.. The R2 Oly speedlites are only $85 anyways!
Uh... the TT350-O is very low-powered. It runs off 2xAA batteries, and is tiny
. It's more like a 270EX. Might be better to go for a TT600 or V850II.
Just wait a year
. Both MFT and Fuji X versions of Godox/Flashpoint's TTL/HSS flashes (TT685 and V860II) are in the pipeline, as are the X1T transmitter units and firmware updates for the Witstro AD units (like your Xplor 600/AD600) as well as the TT685/V860II to autoswitch. The picture should be similar to what happened when Godox added Sony compatibility to the R2 system. It's just going to take a while. I mean, the firmware update for TT685 flashes to accept commands from the X1T-S(ony) only came out last week. 
See the overview of the X1/R2 system on flash havoc
.