As I wrote here: https://visualsciencelab.blogspot.com/2017/06/the-story-i-glossed-over-about-real.html I was a bit miffed at myself for not diving deep enough into the Panasonic fz2500 manual (page 180; thank you dear reader...) to know that, in addition to providing a clean 10 bit, 4:2:2 HD file over HDMI, the camera was also capable of providing the same configuration but in 4K (UHD). For a product that costs around $1200 this is an amazing feature. The closest competitor in the Sony realm is a dedicated video camera called the PXW-Z150 which sells for about $3200 (USD).
Once I'd been made aware of this capability I started researching to find out which external video recorder might be the best one for my needs. I settled on the Atomos Ninja Flame which provides the ability to accept the 4K files from my fz2500, but also from every single one of the Sony cameras I routinely use in my work.
The difference in the outputs to the card and to the camera are pretty big. The greater bit depth means more distinct colors while the move from 4:2:0 to 4:2:2 means less color interpolation. The payoff is when one goes to edit the files. The color transitions are