Steiner navigator pro binoculars. The 7x30 Navigator Pro weighs only 20 oz. and incorporates the exclusive Steiner Sports-Auto-Focus system. Once set for the user's eyes, the binocular keeps all objects in focus at distances from approximately 20 yards to infinity. Because of the greater depth of field in the Porro-prism, the binocular allows boaters to scan an entire seascape without having to readjust the focus. It can also be faster in locating navigational marks, hazards, harbor entrances, boats and other man made objects when used in conjunction with the integral compass. The right side compass is illuminated electronically, allowing the user to get a bearing instantly in the dark. Weight: 20 oz, Field of view: 369 feet @ 1000 yards, Eye relief: 20mm, Dimensions: 4.6"L x 6.8"W x 2.2"H