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.