Adorama Step-Up Adapter Ring 72mm Lens to 77mm Filter Size
Does the job.
Cons: Weak Construction
Describe Yourself: Semi-pro Photographer
Was this a gift?: No
This step-up ring works, but screwing it onto a lens is tricky. It doesn't screw on as smooth as the filters I have, and actually sticks before it's all the way on. Taking it off, I feel I have to be very careful not to bend the ring, the metal feels flimsy. But in the end, it does what I need it to.