The Fujinon Mariner are the ideal binoculars for any type of marine leisure activity. These binoculars are waterproof, lightweight, and rugged as they are primarily designed to be used in high-humidity environments such as on boats. This pair has a magnification of 7x with an object lens diameter of 50 mm. A relative brightness rating of 51 provides you with clear visibility. It gives you an eye relief of 18 mm. These binoculars have an apparent field of view of 7 degree. At a range of 1000 m, they provide you with an apparent field of 131 m. These Fujinon binoculars have dimensions of 178 x 200 x 65 mm and weigh around 885 g.