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SkyMaster 20x80 Porro Prism


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  • 20x magnification porro prism binocular
  • Giant 80 mm objective lens offers maximum image brightness in low-light and long-range conditions
  • Ultra sharp focus across the field of view
  • Multi-Coated optics for sharp, clear views
  • Suitable for terrestrial or astronomical viewing
  • Protective rubber covering for ultra-firm grip
  • Large center focus knob for easy focusing
  • Integrated tripod adapter rod for ultra-stable tripod mounting
  • Long eye relief ideal for eyeglass wearers
  • Soft carrying case included for travel and safe storage
  • Limited Lifetime Warranty provides best protection and product support on the market


Angular Field of View 3.7″
Close Focus 108 ft (33 m)
Exit Pupil (mm) 4 mm
Eye Relief (mm) 18 mm
Magnification (x) 20x
Objective Lens Diameter (mm) 80 mm
Optical Coatings Multi-Coated
Prism Glass (Type) BaK-4
Relative Brightness 16
Twilight Factor 40
Weatherproof Water Resistant
Weight (oz) 75 oz (2126 g)

Additional information