Ÿ?Convenient dual use (land / underwater) wide conversion lens in compact size. The maximum view angle is 105ô› underwater for wide imaging and 179ô› on land for fish-eye imaging. Ÿ?Unique optical design allows to shorten minimum focal distance with ultra wide view angle thus effective for wide macro shot. Ÿ?Optical construction consists of 4 elements in 4 groups with coated optical glasses- which effectively suppress optical aberrations and elicits master lens performance. Ÿ?Bayonet AD Mount compatible to support instant installation and speedy lens exchange underwater. Ÿ?The UWL-105AD is attached on compatible camera / housing via AD Mount Base which is exclusively designed for each housing.