Product DescriptionFor top performance in a marine environment, these Nikon binoculars are a good choice. They're sealed with O-rings and filled with nitrogen gas to minimise the effect of temperature changes, making them ideal for nautical applications. Optics are crisp and bright and the binoculars even feature a built-in compass to help keep you on course. Central focusing system; waterproof and fog-free with O-ring seals and nitrogen gas).Built-in compa |