A self-adhesive foam ring accessory designed to minimize internal reflections when the Olympus FCON-T02 fisheye conversion lens is used behind a dome port underwater. The ring slides onto the exterior of the lens before it is attached to the camera. It is made specifically for the FCON-T02 lens as used on the Olympus TG-5, TG-6 and OM System TG-7 cameras. Very lightweight at about 0.1 oz.
