Bushnell Falcon 10x50 Wide Angle Binoculars (Black) Quality optics with stunning HD clarity 10X magnification, 50-Millimeter lens diameter, and auto focusing Porro prism 25-Feet close focusing distance, 27-Ounce weigh 9-Millimeter eye relief and 5-Millimeter exit pupil, 300-Feet field of view at 1000 yards Exit Pupil(mm):5, Eye Relief (mm):9 Boasts durable design and rubberized, abrasion-resistant finish Porro prism; full lens coating provide sharp viewing