Nikon 20x120 III Binocular Telescope

Nikon 20x120 III Binocular Telescope

Nikon 20x120 III Binocular Telescope

B&H # NI20X120BTS MFR # 8713

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Expected availability: 6-10 weeks

Product Highlights

  • Aberration-Compensated Lens Design
  • Fully Multi-Coated Optics
  • Pan-Tilt Manual Alt-Az Mount
  • Nitrogen Filled, Water and Fogproof
  • Corrosion-Resistant Aluminum Housing
  • Individual Focusing Eyepieces
  • Fold-Down Winged Rubber Eyecups
  • Long Eye Relief, Wide Exit Pupil
  • 34 Pounds Without Mount and Base
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This item is noncancelable and nonreturnable.

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Nikon 8713 overview

  • 1Description

From watching boats from a balcony to gazing at the lunar surface, the Nikon 20x120 III Binocular Telescope combines the viewing comfort of the former with the power of the latter to give you an optic that represents the best of both worlds.

Utilizing a binocular design allows you to view with both eyes open for more comfort during long observation sessions while presenting you with a true 3D view versus conventional single-eyepiece telescopes. The ratio between power and aperture yields a spacious field of view, wide exit pupil, and extra-long eye relief to ensure full and clear views without vignetting in all conditions—even at night when pupils are open and fully dilated. The large objectives also help to offset the dimming that is often associated with high-power optics such as this, even during the day, so views remain bright and clear.

To ensure the best possible view, the eyepiece lenses are designed to compensate for spherical aberration and the entire optical path is fully multi-coated to reveal flat high-contrast views with accurate color free from edge distortion, color fringing, halos, and astigmatism that can interfere with enjoying the scene. Each eyepiece focuses individually to give you the ability to get the tack-sharp views that traditional center focusing mechanisms are sometimes unable to achieve at high magnifications. Winged eyecups conform to your face and keep stray peripheral light from interfering with the view, limiting distractions and increasing contrast and clarity.

Designed for permanent mounting on a pier or porch, the binocular-telescope comes with a manual alt-azimuth fork mount. Capable of rotating a full 360°, it can tilt upward to 70° to view overhead or downward -30° if you're viewing land- or sea- based subjects from a balcony. To withstand the elements, the chassis is made from a durable and corrosion-resistant aluminum alloy, and the optical tubes are nitrogen filled and O-ring sealed to be waterproof and resistant to internal fogging in extreme conditions.

The Nikon 20x120 III Binocular Telescope is a versatile and powerful optic for viewing terrestrial objects at extreme distances and enjoying wonders of the night sky such as the Moon, planets, comets, or some bright deep-sky objects like star clusters or galaxies.

Optical Performance
  • Powerful 20x magnification is ideal for extreme long-range terrestrial use, or for lunar and planetary viewing or wide-field comet hunting
  • Large 120mm objective lenses help to offset the dimming that is common with high-power optics during the day and to draw in the light required for astronomy use
  • Aberration-compensated lens system minimizes field curvature and color fringing for a flat and consistent field of view without distortion or astigmatism
  • Anti-reflection fully multi-coated optics maximize light transmission for bright and clear images with accurate color rendition and improved contrast and clarity
  • Apparent viewing angle approaches wide angle to present a spacious and immersive field of view
  • 157-foot field of view at 1000 yards
Use and Handling
  • Individual focusing eyepieces ensure tack-sharp images by any user
  • 58-74mm interpupillary distance adjustment range
  • Fold-down rubber eyecups for comfortable use with or without eyewear
  • Ultra-long 20.8mm eye relief provides the room needed for the user to back off the eyepiece for more comfortable viewing with reduced chance of hitting the eyecup and causing distracting vibrations
  • Large 6mm exit pupil ensures complete coverage when pupils are fully dilated in low light, such as at dawn or dusk, or at night
  • Easy-to-use alt-azimuth fork mount
  • 360° pan and -30° to +70° tilt range for terrestrial viewing on a deck or patio or astronomical viewing high above the horizon
  • Optional rigid fixed-pillar stand available for maximum stability and vibration reduction
  • 17.3" (44cm) height with included stand and binocular tubes in horizontal position
Construction Details
  • Shock- and corrosion-resistant aluminum chassis and housing
  • Nitrogen filled and O-ring sealed to be waterproof and submersible for 6.6' (2m) for up to 10 minutes and resistant to internal fogging when moving through extreme changes in temperature or environmental conditions
  • Winged (angled) eyecups keep stray peripheral light from interfering with views while improving contrast and limiting distractions
  • Weight: 34 lb without included base
UPC: 018208087136

Nikon 8713 specs

Prism Type Porro
Magnification 20  x
Objective Lens Diameter 120 mm
Angle of View 3.0° (Actual)
Field of View 156.6' @ 1000 yd / 52.0 m @ 1000 m
Minimum Focus Distance 436.4' / 133 m
Exit Pupil Diameter 6 mm
Eye Relief 20.8 mm
Interpupillary Adjustment 58 to 74 mm / 2.3 to 2.9"
Focus Type Individual
Tripod Mount Yes (Adapter Included)
Dimensions 26.8 x 17.8" / 68.0 x 45.2 cm
Weight 34.2 lb / 15.5 kg
Packaging Info
Package Weight 62.5 lb
Box Dimensions (LxWxH) 33.0 x 23.0 x 20.0"

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