Sea & Sea 16mm Super Wide Conversion Lens f/ Nikonos

Here is a superior optic to challenge all higher priced wide lenses on the market. It converts the Nikonos 35mm F2.5 standard lens to a wide lens via a simple screw mount, expanding its field of view from 46° to 91° and reducing minimum focusing distance from three feet to one foot. It can be attached and detached underwater.