Zeta Lupi forms the southern-most point in the asterism. It's found southwest of alpha a little more than one binocular field of view. Or move directly east from alpha, where you'll encounter mu Lupi. Zeta is in the same field of view: binoculars.

Just south of zeta, barely in the same field of view (if mu is at the upper edge) is the open cluster NGC 5822, about a hundred stars spread over a large field.