Big 50mm objective for a larger, brighter field of view. Fully Multi Coated - Multiple layers of anti-reflective coating on all air-to-glass surfaces deliver bright, high-contrast images. IPX7 Waterproof construction - O-ring sealed optics stay dry inside, when immersed in three feet of water for up to 30 minutes. Bushnell Legacy 10x50mm Black Binoculars 120150