URSA Kit for Live Services - Low Light?

B&H has this kit: Blackmagic Design URSA with ENG Telephoto Lens and Rear Zoom/Focus Control Kit ($10k US)

20x Fuji lens. We're 60' from the podium. How do I know how close I can get with this lens? Is there a formula?

I want to shade with the ATEM matching to Sony PMW cameras (1080i). Will I have a problem with grain?

Is there a better camera/lens option?

Well it’s 8.5-170mm focal length and it’s a 2/3” lens so there will be calculating tables on the internet, like this one: https://www.pointsinfocus.com/tools/depth-of-field-and-equivalent-lens-calculator/
So a quick look tells me you can film the upper body with that lens. Keep in mind the B4 mount has glass in it which reduces the results by 1.1.

Awesome, thanks for the info.