Reading/ Modifying single CFrame Angle value

I am currently modifying a gun system. The script works I’d just like to know how to only have the Vertical/ Y value of the camera modifying the ProneCF rather than the whole CFrame.

Example of the script.

ProneCF = ProneCF:Lerp((CFrame.new() * CFrame.Angles(0,0,0) * cam.CFrame.Rotation), 1):Inverse()

So instead of the entire rotation of the camera inversing the prone CFrame. I’d just like it to be a singular angle value. Thank you! If possible provide an example.