Hi, I am spreading the news about the failure of communication between Canon "Sender" (Master) flashes and Canon "Receiver" (Slave) flashes. Since around 2020 the communication between Master and Slave flashes can be broken by a public radio wave of some kind. I’m not an EE, so I can’t tell you what the source of the problem is, but I can tell you that I have tested equipment all over the greater Seattle area, and about 80% of the time the Slaves disconnect from the Master in under 20 minutes of being turned on. The shortest time to disconnect happens in 60 seconds with most disconnects occuring in 8-12 minutes. I’ve only tested this in the greater Seattle area, but I suspect that if you are in a major urban area you will experience this failure. I’ve tested this with Canon 600EX RTs and with a new R3, RL-5, and ST-E10, so it’s happening to the latest Canon equipment. I hope some find this helpful. This problem drove me crazy. You can read about what I’ve tested here: https://hestonphoto.com/info/canon-flash-failure-01.html
Interesting info for the forum members. I definitely got a small chuckle reading it and hitting the phrase older 600RTs, i guess it has been over a decade now since the started the RT line. On the plus side not all is lost, you can still use some decent 3rd party triggers like my trusty old Yongnuo 622s i have had for over a decade.
Johnsey, I'm learning that I'm not unique in this regard. Yeah, extra triggers... getting rid of extra things that you have to own and take and put batteries in was the whole point of the RTs. What frustrates me is that Canon is still selling these and they must know they don't work! and that seems to me to be consumer fraud.
It's interesting to see that other people have run into this. They way Canon treated me I thought I was the only one. Seems a lot like consumer fraud, as Canon continues to sell the product knowing of its failures.
