I'm looking for a full-frame camera and I value stills and video capabilities equally. On the video side, I am particularly interested in 4:3 shooting, using the full height of the image sensor. Highlight rolloff is important to me. I don't mind noise, but I don't like compression artifacts. I am open to using external recorders like the Ninja V, but not particularly excited to.  To those who have used both the Panasonic S1 and S1R, would you say that the 5K 4:3 10-bit 4:2:0 HLG shooting mo