The 0.75x lens design uses high grade2-element optical glass components that deliver crisp edge-to-edge sharpness. All internal optical elements are fully, multi-coated to prevent glare and maximize light transmission. The lens fits all SeaLife DC-series cameras and other cameras with a 52mm thread mount, and comes with a 52mm DC adapter ring (SL977). Easily attach and remove this lens both on land and underwater. The SeaLife Conversion Lens is waterproof to 164ft/50m and weighs only 5.5ounces (155grams) making it travel friendly and easy to handle underwater.