The Nikon 7x50 OceanPro Binoculars is the perfect companion to your water bound activities. It is nitrogen filled and O-ring sealed for waterproof, shockproof and Fogproof performance. The rubber-armored exterior provides a non-slip grip and helps prevent sliding on the helm station or console, even in rough conditions. Tough, lightweight polycarbonate construction makes the OceanPro durable enough for everyday carry in wet, rough environments common to ski boats, runabouts, fishing boats, and personal watercraft. The large, 50mm objective lenses provide a 7.1mm exit pupil for maximum light gathering, while a diopter adjustment and large central focus knob make focus easy to achieve and maintain. Utilize fold-down rubber eyecups that protect the eyes from bumps in rough water conditions and provide 22.7mm of eye relief to accommodate eyeglass wearers and non-eyeglass wearers alike.