Professional Marine Binoculars10X50 binoculars provides 50mm large objective lense and 22mm eye relief, which offer a extra large view and comfortable observation. 6.8mm exit pupil, and field of view is 396 feet at 1000 yards / 132 meters at 1000 meters. With 5 diopter left and right diopter ring.Rangefinder Compass and Night vision Illuminated compass built-in for direction location, with an internal rangefinder for calculate the distance and size of the target object. By specifying the ruler, you can directly calculate the distance of the object on the left eyepiece. The illuminated compass can be used to identify direction. Press the light button, this function still can use on nights.High Contrast And Resolution Images Latest optics technology, tHigh refractive index BAK4 Porro Prism eliminates the stray light and improves color reproduction to 99.99%. Green FMC anti-reflective coating reduces the reflected light in the objective lens and improves light transmission, image brightness and image sharpness.Floating Waterproof Fogproof This binoculars come with nitrogen-filled and O-ring sealed for waterproof and fogproof protection. Even fall into water it still can floating on the water, So it's have a good perfomance for outdoor use in all weather conditions.Ergonomic DesignErgonomic grip design, consumes the least energy. Wearing the harness strap is the most comfortable way to carry binoculars for a long time.Binoculars with bag and strap, convenience to use and storage.Perfect for navigation, boating, fishing, water sports, hunting, traveling, concerts, bird watching, hiking, camping,etc.