« Last post by shtarker on Today at 10:17:48 PM »
Yongnuo is apparently working on a clone of the 600EX-RT, but it isn't out yet; If you can live without a second light for a bit I'd wait and see how it works out. The other Yongnuo lights may have optical triggering, but no sense spending for that if you're already into Canon's radio system.
Thanks! I did a google search on the Yongnuo 6xx ex rt and it has been rumored as coming out since mid 2013. A lot of people are getting upset that Yongnuo keeps stringing them along. Could it be due to legal issues with Canon? Or is the Canon method of radio transmission not proprietary?