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Eyeskey Captor-ED 10X50 Binoculars


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● Extra-low dispersion (ED) glass
● Super Multi-Coated Lenses
● Phase Corrected and Dielectric Coated
● Corrosion-resistant magnesium-alloy chassis
● IPX-7 waterproof and fogproof


Designed with large objectives, Bak-4 roof prisms, and extra low-dispersion glass, the Captor 10x50 Endurance ED Binoculars are ideal for low-light situations, such as during pre-dawn and post-dusk periods. The combination of glass and coatings combined with anti-reflection fully multi-coated optics produces bright and clear high-contrast images with accurate color rendition and virtually no fringing. Whether hunting, birding, boating, or watching sporting events, the Captor will bring your subject up close for making detailed observations.

To help offset the weight of the over-sized objectives, the Captor ED is built with a lightweight Magnesium Alloy chassis that is corrosion resistant to help it hold up to a lifetime of outdoor use. The chassis is protected by a texturized armor that provides a non-slip grip, especially in cold and wet conditions. The optical tubes are nitrogen-filled and O-ring sealed to be waterproof and fog-proof - especially in extreme weather conditions. To reduce user fatigue and keep them steady, a tripod adapter mount is located in the front of the hinge for setting them up on a support system. A right-eye diopter adjustment allows the binoculars to be customized to most people's needs, and the twist-up eyecups mean they can be comfortably used with or without eyewear.

Optical Performance

  • 10x magnification
  • Large 50mm objective lenses
  • Compact BAK4 roof prisms
  • Extra low-dispersion (ED) glass helps to correct chromatic and spherical aberration to improve clarity and sharpness with accurate color representation without ghosting or halos, and limited distortion — especially at the edges of the field of view
  • Anti-reflection fully multi-coated optics improve light transmission and contrast and provides an accurate color rendition
  • 320ft wide field of view at 1000 yards 
  • Short 6.56' close-focus distance

Use and Handling

  • Open-bridge, dual-hinge configuration
  • Large textured center focus wheel
  • Right-eye dioptric correction
  • Twist-up rubber eyecups for comfortable use with or without eyewear
  • Tripod mountable with optional adapter
  • Comfortable 17mm eye relief
  • 4.88mm exit pupil

Construction Details

  • Nitrogen-filled and O-ring sealed to be waterproof and to resist internal fogging when moving between extreme temperature variations
  • Open-bridge/dual-hinge configuration provides more gripping surface area to improve hold and comfort
  • Protective black armoring provides a slip-resistant grip, especially in cold and wet conditions
  • Weight: 30.68 ounces

Prism Type Roof (BAK4)
Number of Lenses 8 Pieces 6 Groups
Objective Lens Type Extra-Low-Dispersion (ED) Glass
Prism Coating Dielectric Coating + Phase-correction Coating
Lens Coating Super Multi-coatings
Eyecup Type Twist-up/down
Chassis Material Magnesium Alloy
Weight 30.68 oz / 870g
Magnification 10 X
Objective Lens Diameter 50 mm
Eyepiece Lens Diameter 24 mm
Angle of View 6.1° (Actual)
Field of View 320' @ 1000 yd / 106 m @ 1000 m
Minimum Focus Distance 6.56' / 2 m
Relative Brightness 25
Twilight Index 22.36
Exit Pupil Diameter 4.88 mm
Eye Relief 17.0 mm
Diopter Adjustment Yes, Right Eye, ±3
Focus Type Center
Interpupillary Distance 56~73 mm
Fogproof Yes, Nitrogen Filled
Waterproof Yes, O-ring Sealed (1 m /30 min)
Packaging Info
Package Weight 2.86 lb
Box Dimensions (LxWxH) 7.992 x 7.008 x 2.834"

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Eyeskey Captor-ED 10X50 Binoculars