Camera at centerpoint?

I have no idea how I did it, but whenever I press NUM0 to go to camera view, the camera doesn’t view from the camera, but from a centerpoint in one of my objects. Have I somehow inadvertently defined one of my objects as the scene’s camera? Anybody know how I can fix it?

You probably have pressed CTRL+numpadzero. This sets the viewpoint to the centerobject you have selected at that time.
This is solved quite easily: select your camera and press CTRL-numpadzero.

Thanking you very muchly.