The DR-49 Decoration Ring is compatible with the M.Zuiko Digital 25mm f/1.8 lens. It fits around the front element and over the filter mount, adding an extra dash of style to the lens, and can be removed to allow for the mounting of filters, lens hoods, or add-on conversion lenses. The ring is included with the 25mm f/1.8 lens and is offered as a spare or replacement part.