The wide-angle conversion lens is for photographing a broad area. When you want to photograph a large object or a vast natural environment, or when you want to include as much of a large subject as possible in your image - that is when the wide-angle conversion lens is effective.

The angle of view increases when you use the wide-angle conversion lens compared to when you use the standard lenses, enabling you to photograph underwater scenery and large objects. Using this lens enables you to get as close as you can to medium-sized to large subjects. This allows you to capture a clear, dynamic image that covers the entire full frame without being greatly affected by how transparent the water is. The sense of perspective is also emphasized, adding to the dynamism of the photograph.