Canon Community

Yes.  The Lav mic in the amazon.com link does work with the HF R800's external mic port.  No static or any other type of interference.  

I am also experiencing the external mic issue.  I purchased a TRRS lapel mic, but apparently the external mic port is a TRS port.  I then purchased a TRRS to TRS adapter, but that was a waste of money since the expernal mic still didn't work.  I just...