Redfield Scopes - 10x50 Center Focus Renegade Porro Prism Binoculars. Model: RF67620. Field of view: 374 ft @ 100 yards. Fully-coated lenses provide enhanced photopic transmission, producing a bright, crisp image. Armored aluminum body. Well balanced, ergonomic body design makes them comfortable and easy to use. Waterproof and nitrogen filled.