Panasonic GH3 Setup Guide. This video will show you some Tips and Tricks for setting up your GH3. It focuses on setting up the Custom 1-5 settings. However, the very end of the video has several demonstrations of issues with the camera so make sure you watch it all the way through. If you like the video then please rate it and subscribe to my channel if you want to see more videos like it. The GH3 has improved on almost everything over the GH2. However, its high ISO still quality is probably the biggest improvement and it is the reason I bought it. The video is still as good or better than the GH2 in all of the modes that the GH2 had. However, the addition of the new 1080p @ 60 FPS .mov format allows me to shoot all of my low light videos with a single frame rate and resolution.