With its bright, sharp views and 3° field of view, the Nikon Binocular Telescope 20x120 IV is the ideal high-power precision optic for commercial fishing, ship- or land-based surveillance, astronomy and other applications requiring extended observation sessions under rigorous conditions. The Binocular Telescope’s proprietary optical system created through Nikon’s glass is built into a highly durable waterproof, fog-proof body designed for extreme outdoor use by professionals and civilians alike.