Nikon 10×50 WX IF Binocular (Black)

Description

Resolve pinpoint star fields and deep-sky open clusters across an expansive visual boundary using the Nikon 10×50 WX IF Binocular (Black) optical observation system. Engineered with an apparent field of view measuring 76.4 degrees (under ISO 14132-1 standards) and an actual angle of view of 9.0 degrees, this astronomical instrument provides an expansive 472.5-foot linear field of view at 1000 yards (157.5m at 1000m), a 5mm exit pupil, and 15.3mm of eye relief for intensive wide-field celestial viewing and twilight horizon surveillance.

The optical system integrates extra-low dispersion (ED) glass elements with phase-corrected Abbe-Koenig roof prisms and an integrated field flattener lens system that counteracts astigmatism and field curvature out to the extreme periphery. Utilizing fully multi-coated lead-and-arsenic-free optics across all glass surfaces, the chassis is cast from lightweight magnesium alloy measuring 29.1 by 17.1 by 8cm (11.5 x 6.7 x 3.1 inches) and weighing 2.5 kg (5.51 lbs). The barrels are nitrogen gas filled and O-ring sealed for water resistance against rain and submersion up to 5m depth for 10 minutes. Field mechanics feature individual eyepiece helical focusing with a 65.6-foot (20m) minimum close focus limit, an interpupillary distance range from 58mm to 78mm, a diopter adjustment scale spanning -6 to +5, six-position click-stop twist-up rubber eyecups, 55mm front objective filter threading, and compatibility with the included TRA-4 tripod adapter.

Key Features of Nikon 10×50 WX IF Binocular (Black)

Designed for professional stargazers and serious optics enthusiasts, this 10×50 instrument unites high-transmission Abbe-Koenig roof prisms with an advanced field flattener optical system. Its nitrogen-sealed magnesium housing provides rugged environmental protection against internal fogging and thermal moisture. Precision individual helical focus barrels and six-position eyecups guarantee sharp edge-to-edge optical resolution across an expansive 76.4-degree apparent field of view.

• 10x magnification power paired with 50mm objective lenses for expansive astronomical resolution
• Abbe-Koenig roof prism system treated with high-reflectivity phase-correction coatings
• Extra-low dispersion (ED) optical glass elements integrated with a field flattener lens system
• Linear field of view of 472.5 feet at 1000 yards (157.5m at 1000m) with 9.0-degree actual angle
• Balanced 5mm exit pupil and 15.3mm eye relief with six-position click-stop twist-up eyecups
• Helical individual eyepiece focusing with an extensive -6 to +5 dioptric adjustment range
• Nitrogen-filled magnesium alloy chassis waterproofed to a depth of 5m for 10 minutes
• Integrated 55mm objective filter threads and supplied TRA-4 custom tripod mounting adapter

Abbe-Koenig Roof Prisms & Field Flattener Optical Elements

By employing Abbe-Koenig prisms operating on total internal reflection, the optical path delivers high light throughput without the light loss inherent to mirror-coated roof designs. Integrated field flattener optical groups correct curvature distortion, ensuring stars appear as razor-sharp pinpoints right up to the optical field perimeter. Multi-layer broadband coatings applied uniformly across all air-to-glass surfaces minimize light flare, providing faithful chromatic neutrality on dense star fields, the lunar terminator, and distant dawn terrain.

Magnesium Alloy Chassis & Independent Helical Focusing

The rigid magnesium alloy body balances weight distribution across the optical tubes, allowing stable hand-held viewing or vibration-free tripod operation via the standard 1/4-20 mounting adapter. The airtight housing is purged with dry nitrogen gas to prevent internal lens condensation during rapid outdoor temperature drops. Individual helical eyepiece focusing dials turn with measured friction, allowing observers to set precise focal calibration for each eye that stays locked during repositioning.

• Independent helical eyepiece focusing dials calibrated with visible diopter alignment markers
• Airtight nitrogen-purged magnesium chassis providing waterproof submersion protection up to 5m
• Six-stage twist-up rubber eyecups delivering exact eye-to-lens alignment for eyeglass wearers

Nikon WX Series Warranty Coverage & Package Inclusions

The Nikon 10×50 WX IF Binocular (Black) is backed by the Nikon limited warranty covering optical components and mechanical assemblies against defects in craftsmanship. The complete factory package contains the Nikon 10×50 WX IF binocular, custom aluminum trunk carrying case with shoulder strap, TRA-4 tripod adapter, soft objective lens covers, eyepiece rain guard, and padded neoprene neck strap.