VIXIA HF G20 Video At Night - Focus Issue

[JohnTurner]

Last night I shot 8 minutes of fireworks with my Vixia HF G20 using M Mode.  Most of the video turned out well and the audio was assume as I was almost directly underneath the display.  I was using M mode and made no other changes to the defaults. 

At times it drifted out and back into focus. How can I keep the scene in focus all the time?

This is the link to the video I am referring to:   https://youtu.be/g9YvlFgFh4A

Thanks in advance

John Turner

[IamintheUK]

Even though you are in M mode you can still have auto focus selected. M merely gives you the capabillity of using manual setting selectivly. When turning on the camera it will default to autofocus. Just set focus to manual and you will be fine. Autofocus systems need light to operate so if you are in a dark enviroment you have to focus manually.

[Greggadventure]

Mine does this in ALL lighting conditions. Did you ever resolve it?