The TCON-T01 teleconverter cannot be attached directly to the PT-059 underwater housing. It requires the CLA-T01 adapter to be attached to the Olympus TG camera itself. If you want to use the teleconverter with the PT-059 housing, you must ensure that the adapter is correctly attached to the camera before the housing is used.

Not available at digitec, look directly on the olympus website in the online shop. The cover is called: LC-40.5