How constrain a camera to the same face on an object?

Support Animation and Rigging
1

I have an object and I want that the camera focused to the same face all the time.
When I move or rotate the object I want that the camera continue focusing to the same face so it should move or rotate too. Can someone help me? thanks:confused:

2

Thread moved from ‘Discussion / Blender and 3D Discussion’ to ‘Support / Animation and Rigging’ forum

Position the 3d cursor to where you want the camera to point (Shift+S)
Add an empty object (Shift+A)
Parent the empty to the object (Ctrl+P)
Add a track to constraint to the camera and set the empty to be the tracked object https://www.blender.org/manual/fr/rigging/constraints/tracking/track_to.html