I like the look of slow motion with the GH5, so I wanted to try shooting an entire real estate demo in 50% speed. For this I used the 4K / 48fps VFR setting (conformed to 24p) on the Panasonic GH5.
Now because of the 48fps setting, I needed to set my shutter speed to around 1/100th to reduce too much motion blur. Finally when working with an F/4 Lens (Panasonic 7-14mm), this also cuts down on the amount of incoming light, so I needed to work with a minimum of ISO 1600.
To control noise, I shot the entire video in 4K and exported to 1080. By downscaling you can mask noise. Also I shot in CinelikeD and exposed to the right (slightly over exposed), which means bringing the exposure down in post and that helps to clean up any noise in the shadows.
The lens remains rectilinear (straight lines) even at the widest setting, and combined with a focal reducer you're actually faster than an F/2.8 (which is better for dim lighting). I believe if I upgrade to a more recent Metabones XL Adapter, i'll get sharper results. But it's pretty darn good as is.
For moving the camera, i'm testing out the CAME-TV Prophet Gimbal which is designed to fly heavier camera setups. The combination of speedbooster and Canon EF type Lens may be a bit heavy for the smaller Optimus gimbal.