The 10x50 Prostaff 5 Binocular from Nikon combines a weather-sealed housing and fully multicoated optics to create a general purpose set of glasses for mid-range viewing tasks. This configuration of the Prostaff 5 features a 52å¡ apparent viewing angle and 16 ft minimum focus distance, making the 10x50 ideal for nature enthusiasts and sports fans. Nikon's Eco-Glass optics are made of responsibly-sourced material that do not contain lead or arsenic.