OM System FCON-T02 Fisheye Converter for Tough Cameras

Bolt the FCON-T02 to the front of a Tough camera and the field of view opens to 130 degrees at 0.3x. Racking the camera's zoom switches the result between a circular fisheye and a diagonal one, so a single accessory covers both looks without a second lens.

It is nitrogen-filled to stop internal fogging when it moves between warm air and cold water, and the finish is waterproof to 15m, which matches the camera's own rating. Wide close-focus like this is the standard trick for reef and rock-pool work: get close, keep the background in the frame, and let the water column between camera and subject stay short.