Vortex 20x56 Kaibab HD Roof-Prism Binocular

BH #VO20X56KB • MFR #KAI-5603
Vortex 20x56 Kaibab HD Roof-Prism Binocular
Key Features
  • Compact Roof Prism Design
  • Phase-Corrected Apochromatic Optics
  • High-Density, Extra-Low Dispersion Glass
  • Argon-Filled Fogproof, Waterproof
The 20x56 Kaibab HD Roof-Prism Binocular from Vortex Optics is designed for high performance in low-light conditions. Whether you're bird-watching or hunting, dawn and dusk are the perfect times to spot and view game, and you need a binocular that can deliver. To make the most of the large 56mm objectives, the lenses are made of high-density (HD) extra-low dispersion (ED) glass with a phase-corrected apochromatic optical system. This produces images that are bright and crisp, with true color transmission, across the entire field of view without distortion. All the optical surfaces are fully multi-coated with Vortex's XR Plus coatings. This anti-reflective coating ensures minimal light loss and maximum light transmission through the lenses. The roof prisms feature dielectric coatings with better than 99% reflectivity to make sure as much light as possible makes it to your eye.
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Vortex 20x56 Kaibab HD Roof-Prism Binocular

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Vortex KAI-5603 Overview

  • 1Description
  • 2Performance
  • 3Use and Handling
  • 4Construction

The 20x56 Kaibab HD Roof-Prism Binocular from Vortex Optics is designed for high performance in low-light conditions. Whether you're bird-watching or hunting, dawn and dusk are the perfect times to spot and view game, and you need a binocular that can deliver. To make the most of the large 56mm objectives, the lenses are made of high-density (HD) extra-low dispersion (ED) glass with a phase-corrected apochromatic optical system. This produces images that are bright and crisp, with true color transmission, across the entire field of view without distortion. All the optical surfaces are fully multi-coated with Vortex's XR Plus coatings. This anti-reflective coating ensures minimal light loss and maximum light transmission through the lenses. The roof prisms feature dielectric coatings with better than 99% reflectivity to make sure as much light as possible makes it to your eye.

The optical tubes are O-ring sealed and argon filled to be water and fogproof. This is especially important at dawn and dusk when dew is prevalent and temperature changes can cause condensation. The Kaibab has a center-focus wheel that is easily accessible with either hand, with a right-hand dioptric adjustment for crisp and sharp focusing. Twist-up eyecups let you customize your eye relief, with or without eyewear. Rubber armoring on the body helps ensure a secure non-slip grip, while providing protection against drops and impacts. Vortex recommends that the binocular be mounted on a tripod, so a tripod adapter is included. Given its size and magnification, using the Kaibab with a tripod will give your arms a break and provide a solid platform with reduced vibration and shake.

Performance

  • 20x magnification
  • 56mm objective lens
  • Compact roof prism design
  • High-density (HD), extra-low dispersion (ED) glass
  • Dielectric prism coatings permit better than 99% light reflection
  • Phase-corrected apochromatic optical system reduces distortion and chromatic aberration for clear and crisp images with true color transmission
  • XR Plus fully multi-coated lens coatings reduce reflection and increase light transmission for brighter, sharper views, especially at dawn and dusk
  • Scratch-resistant ArmorTek coatings protect exterior lens surfaces from scratches, oil, and dirt

Use and Handling

  • Textured center-focus wheel
  • Right-eye dioptric adjustment with lock
  • Twist-up eyecups for eye relief, even when wearing eyeglasses or sunglasses
  • Tripod mount at front of center hinge
  • Binocular tripod adapter included

Construction

  • O-ring sealed and argon filled, water and fogproof
  • Rubber armor coatings provides a non-slip grip and extra protection from drops and knocks

Vortex KAI-5603 Specs

Prism TypeRoof
Magnification20x
Objective Lens Diameter56 mm
Angle of View3.2° (Actual)
Field of View168' @ 1000 yd / 56 m @ 1000 m
Minimum Focus Distance148.3' / 45.2 m
Exit Pupil Diameter2.8 mm
Eye Relief15 mm
Interpupillary Adjustment61 to 76.2 mm / 2.4 to 3"
Focus TypeCenter
Tripod MountYes (Adapter Included)
Dimensions7.7 x 5.7 x 2.5" / 19.6 x 14.5 x 6.3 cm
Weight2.7 lb / 1.2 kg
Packaging Info
Package Weight4.75 lb
Box Dimensions (LxWxH)12.8 x 8.1 x 4.3"
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