Camera absolute orientation control with joystick axes?

I’m trying to control camera angles using a (virtual) joystick.
Unfortunately anything I try operates in “slew” mode, i.e. joystick centered camera maintains position, and the further the axis is from center the faster the camera rotates.

That’s not what I need, for my application the camera just needs to point to where the joystick is i.e. joystick centered camera centered, joystick right camera looks right etc.

What setting or assignment have I missed?