Orient animated camera horizon to object Y axis I have Empty in scene center and camera as a child to this empty.
Camera always look in center of scene and 2m far from this center.
In center i have long Y side object.

I "tilt" camera by adjusting Empty Y angle. And rotate around center of scene by rotating Z of empty.

Is this possible using constrains made camera horizontal (Y) orientation always horizontal to this long object?
I found solution.

Locked Tracking to Empty moved along object Y angle.