The Ikelite W-20 is a high quality wide-angle conversion lens that works on many housings with ports that have a 46mm thread. The lens has a magnification of 0.56x.
The use of a wide-angle lens allows you to get closer to your subject. This eliminates water between you and your subject, increasing contrast and improving color. The wide angle conversion lens can be attached and removed when underwater for maximum versatility.
W-20 Underwater Wide Angle Conversion Lens w/ 46mm Thread
Front and Rear Lens Caps
Lens Cleaning Cloth