Intova Underwater Wide Angle Lens Thread mount: 67mm (46mm and 52mm with included thread mount adapters) Construction: 2 groups/2 elements Material: Optical glass lens, Aluminum alloy barrel Magnification: 0.65% Weight: 350g Dimensions: (8.7 x 4)cm with adapter, (8.7 x 3.6)cm w/o adapter Depth rating: 50M View angle: 75 deg underwater / 87 deg above water