Nikon Prostaff 5 12x50 Binocular. This Binocular from the experts at Nikon Sport Optics features multilayer-coated lenses and Eco-glass with a body made of fiberglass-reinforced polycarbonate resin making them lightweight and durable enough for wherever your next adventure takes you. For a great way to make sure that you are completely aware of your surroundings choose the Nikon 12x ProStaff 5 50mm Outdoor Binocular. Specifications for Nikon ProStaff 5 12x50mm Roof Prism Binocular: Manufacturer: Nikon Color: Black Magnification: 12 x Objective Lens Diameter: 50 mm Prism System: Roof Prism Material: BAK4 Eye Relief: 15.5 mm Exit Pupil: 4.2 mm Field of View Linear: 246 ft at 100 yds Optical Coating: Multi-Layer Coated Binoculars Focus System: Center Focus Close Focus: 16.4 ft Water Resistance Level: Waterproof Length: 3.9 in Weight: 27.9 oz Condition: New Magnification Type: Fixed Fogproof: Yes Brightness Index: 17.6 Objective Lens Material: Lead and Arsenic Free Eco-Glass Eyecups Types: Turn-and-Slide Features of Nikon 12x50mm ProStaff 5 Binocular: Lightweight Durable Eco-Glass Large Objective Lens Fiberglass-Reinforced Polycarbonate Resin Package Contents: Nikon ProStaff 5 12x50mm Binocular Nikon 7573: Prostaff 5 12x50 Binocular