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Canon 5D Mark IV - Troubleshooting Flash, Remote Trigger, and AutoFocus


Hey everyone,

I'm attempting to troubleshoot an issue I'm having with flash and a remote trigger. I'm using the Canon 5D Mark IV.

While in live view, I am able to take a photo, but the flash will not trigger when taking a photo. If I switch live view off, the flash will trigger. Why is this? Is there a way to override this?

When I'm not in live view, and autofocus is enabled on my lens, my remote trigger is inconsistent. Sometimes it will take the shot, but other times it will simply autofocus, and won't take the shot. I can see it getting signal on the back of the camera, but don't know why it isn't firing.

If I switch my lens to manual focus, the trigger will fire the flash and take the photo every time. Any idea what might be causing this?

My flash is controlled by RF via a hot shoe mount, and the remote trigger is connected via the remote terminal port.

Any help is appreciated. Thank you!

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