Relationship between View, CameraTarget, CameraPosition, CameraViewAngle properties

I'm struggling to understand the relationship between View, CameraTarget CameraPosition and CameraViewAngle properties of axes (c. f.: https://mathworks.com/help/matlab/creating_plots/defining-scenes-with-camera-graphics.html). I always imagined the line between 'CameraTarget' and 'CameraPosition' to be the optical axis of the camera, which can be alternatively defined by azimuth and elevation. But that seems to be incorrect. For example, a change of CameraTarget does not change View and CameraPosition, but rather modifies CameraViewAngle. Can someone explain how these are linked to each other?

(This is a follow up question on https://mathworks.com/matlabcentral/answers/1686504-camera-and-view-function-and-properties.html)