Ikelite INON UWL-H100 28M67 Type 1 Wide Angle Wet Lens is an attachment lens for underwater photography that can be screwed onto the lens port of compatible underwater housings for 28mm (35mm film equivalent) wide digital cameras or camcorders. The lens can be easily attached or detached underwater. It features a dual-use design, serving as an ultra-wide converter underwater and a fish-eye converter in the air. The unique optical design allows for a shortened minimum focal distance with an ultra-wide view angle, making it effective for wide macro shots.