Nikon Aculon A30 10x25 Binocular - Black Features: - Compact and lightweight - Multilayer-coated lenses for brighter images - Firm, comfortable, rubber-coated grip - Fold-up design; easy to carry around - Eco-glass optics that are free of lead and arsenic are used for all lenses and prisms Specifications: - Magnification (x): 10 - Objective diameter (mm): 25 - Angular field of view (Real/degree): 5.0 - Angular field of view (Apparent/degree): 47.2 - Field of view at 1,000m (m): 87 - Exit pupil (mm): 2.5 - Relative brightness: 6.3 - Eye relief (mm): 13.0 - Close focusing distance (m): 3.0 - Weight (g): 275 - Length (mm): 122 - Width (mm): 115 (72)* - Interpupillary distance adjustment (mm): 56-72