I am having difficulty getting my Canon speedlites (600ex master and two 430ex slaves) to fire when using Live View on my 5D Mark III.
I have no triggering problems except when using Live View. I was even able to get the speedlites to fire when using the EOS utility tethered to the camera. However, when I use Live View on the camera and trigger using the camera or a remote, no dice.
I have looked at other similar issues, but all seem to relate to non-Canon flash units. I tried setting Silent Mode to off for my case, but that made no difference.
Any ideas? I'd like to use Live View because I have an external monitor for people to view their photos prior to snapping the pic, in a photo booth setting.