It does seem to scale in the way I assumed.
I'm assuming -100 = 4294967196 ?
Tried that and it seemed as good as it could get, but it is a new experience having the camera orbit like that.
You can put your CPI, cm/360, sensitivity, or whatever in here, with whatever distance, and it will tell you what to use: Calc for distance at 90 FOV
c = cpi, sens, or whatever
x = distance