Nikon 7x50 Oceanpro Waterproof Binoculars. Bright, multicoated optics featuring multiple layers of anti-reflective compounds offering excellent brightness and resolution. Smooth central focus knob with fast range of focus for quick viewing. 22.7mm of eye relief provides comfortable viewing for eyeglass wearers. Maximum exit pupil ensures you 'catch' the image, even with motion at sea. Durable rubber armor gives you a solid surface to grip-even when wet. Waterproof/fogproof being nitrogen filled and O-ring sealed.