52mm 77mm Step Up Ring

General Brand 52mm-77mm Step-Up Adapter Ring (Lens to Filter)

Allows you to use larger size filters on lenses with a smaller diameter thread. The first number is the size that screws into the lense, the second number is the filter size.

This step ring allows you to attach a standard 77mm filter to a lens that takes 52mm filters. This allows you to have a set of filters that will fit on more than one size lens.