A wide-angle conversion lens with M67 screw mount.
When the lens is mounted, the angle of view increases from 28mm to about a maximum of 17mm (35mm film camera equivalent). The lens can be detached and attached underwater; it can also be used on land.
Use of an external strobe is strongly recommended; using the built-in flash when the lens is mounted may cause shadows to appear in images.
The lens is compatible with the MDX-X10* (for the FUJI Film X10/X20), the Nikon WP-N1+ / WP-N2*, the Olympus PT-EP06L, PT-EP05L as of March 2013.
* For starred (*) housings, slightly zoom to telephoto side to avoid vignetting.