This INON mount base is designed for the Olympus PT-043 housing. It attaches securely to the base of the housing once the diffuser is removed.
The 28AD mount base is the attachment point for INON's UWL-100 28AD wide conversion lens as well as INON's UCL-165AD close-up lens. The UWL-100 28AD is a wide angle conversion lens with 100 degree maximum underwater view angle. It is designed to provide optimum optical performance with camera/housings having a 28mm wide lens (35mm film equivalent). The UCl-165AD close-up lens has a 165mm focal length and makes high magnification close-up photography possible by shortening the close focus distance, allowing the photographer to get closer to the subject.
INON Grip Base (DII or DIII) or ULCS Digital Tray (tr-d) can also be attached to the bottom of the mount base if needed.