STYRKA Binoculars S7 8x 42mm ED Glass The versatile choice. Provides a wider field of view and a brighter image than 10x models - Magnification: 8x - Objective Lens Diameter: 42mm - Lens Coatings: Fully Multi-Coated – STYRKA SXL-MAX Coating - Angular Field of View: 7.8° - Linear Field of View: 409ft/136m@1000yds/m - Close Focus: 6.5ft / 2m - Eye Relief: 18mm - Exit Pupil: 5.25mm - Prism Type: BaK-4 - Prism Coatings: Phase and Dielectric - Waterproof: Waterproof (IPX7) and Nitrogen Purged - Relative Brightness: 27.5 - Twilight Factor: 18.3 - Interpupillary Distance: 58-72mm - Diopter ADJ Range: ±3 - Weight: 22.7 oz - Size (LxWxH): 5.5x5.06x2.06