Olympus posr ep11 antireflective ring for mzuiko digital ed 30mm 135 macro
Designed for use with the olympus 30mm f35 mzuiko digital ed lens the olympus posr ep11 antireflective ring is a spare or replacement anti reflective ring for underwater housing by blocking the writing on the front element of your lens from being reflected in the housings lens port it prevents the writing from showing up in your photos or videos