STYRKA Binoculars S7 8x 30mm ED Glass Compact and lightweight. Ideal for the weight- and space-conscious hunter who still wants quality optics - Magnification: 8x - Objective Lens Diameter: 30mm - Lens Coatings: Fully Multi-Coated – STYRKA SXL-MAX Coating - Angular Field of View: 8.3° - Linear Field of View: 436ft/145m@1000yds/m - Close Focus: 8.2ft / 2.5m - Eye Relief: 15.1mm - Exit Pupil: 3.75mm - Prism Type: BaK-4 - Prism Coatings: Phase and Dielectric - Waterproof: Waterproof (IPX7) and Nitrogen Purged - Relative Brightness: 14.1 - Twilight Factor: 15.5 - Interpupillary Distance: 56-73mm - Diopter ADJ Range: ±4 - Weight: 17 oz - Size (LxWxH): 4.63x4.81x1.88