Camera Softimage's FOV pin question

Hi all, thanks in advance for your time.

How is a value of 0.20 for Camera Softimage’s FOV related to a 360° system? Does it equal to 72° (360/5; I’d say an impressive no)?
How could I translate the 0.20 into “something usable” in trigonometry?
What I’m missing?

it’s half of a cycle, so multiply it by 180, simple as that.

EDIT: ah, my bad, you have to take 360 instead of 180! your initial guess is right. sorry for the confusion.

here is all on angles in vvvv. check the very bottom of the page where we list all conversion nodes.

Well, it’s official.
I’m hallucinating.