Styrka S9 Series Full Size Binoculars - 15x56

Styrka S9 15x56 Binoculars Kit - Advanced, extra-low dispersion (ED) optical glass provides razor-sharp images and superb color correction while dramatically increasing clarity during low-light situations. Phase coated prisms; Coating applied to one surface of the prism increases contrast and sharpness by correcting out-of-phase light. Abbe Koening Prisms; Prism design with a more direct optical path is ideal for large objective binoculars, improving performance and light transmission. All lens surfaces are coated multiple times utilizing our proprietary SXL-MAX anti-reflective flat broadband coatings for maximum brightness and optimal color, sharpness and image contrast, while maximizing transmission across the entire visible light spectrum for true-to-nature color representation. Ergonomic design allows fingers to wrap around the barrels of the binocular for improved grip, steadiness and one-handed use. Fully sealed housing for performance in all conditions; submersion tested for 30 minutes in 1 meter (3.3 feet) of water. Internal housing is purged of air and filled with dry nitrogen gas to prevent internal fogging. Provides tough, durable external protection and a secure no-slip grip. Twist up or down for a custom fit to your eye, with or without glasses.

• Magnification: 15x
• Objective Lens Diameter: 56mm
• Angular Field of View: 4.4 Degrees
• Linear Field of View: 231ft/77m at 1000yds/m
• Close Focus: 9.8ft
• Eye Relief: 18mm
• Exit Pupil: 3.7mm
• Prism Type: Abbe Koenig
• Prism Coatings: Phase
• Waterproof (IPX7) and Nitrogen Purged
• Relative Brightness: 13.7
• Twilight Factor: 28.9
• Interpupillary Distance: 55-74mm
• Weight: 51.3 oz
• Size: 8.25 (L) x 6.25 (W) x 2.68 (H) in.