Nikon 25×120 Telescopic Binoculars with Fork Mount

Description

Survey long-distance maritime corridors and celestial coordinates using the Nikon 25×120 Telescopic Binoculars with Fork Mount observatory-class observation system. Integrating high-power 25x magnification with large-aperture 120mm objective lenses, this high-precision optic provides a 150.6-foot linear field of view at 1000 yards (50m at 1000m), an actual field of view of 3.0 degrees, an expansive 4.8mm exit pupil, and an accommodating 18.9mm eye relief designed for comfortable extended binocular glassing during coastal surveillance, border monitoring, and commercial fishing fleet identification.

Featuring high-density optical glass elements aligned in a traditional Porro prism design, the binocular maximizes photon throughput and depth perception over long terrestrial and astronomical distances. Optical surfaces receive multi-layer anti-reflective coatings to suppress ghosting and internal flare under bright maritime conditions. The binocular body measures 670mm in length by 454mm in width and 160mm in height (26.38 x 17.87 x 6.3 inches), tipping the scale at 14 kg (30.86 lbs) for the optical head alone. Constructed from corrosion-resistant cast aluminum alloy, the chassis is O-ring sealed, nitrogen filled, and rated IPX8 waterproof up to 2m submersion for 10 minutes. The optical assembly mounts onto a dedicated 360-degree azimuth and -30 to +70 degree elevation fork mount, featuring individual helical eyepiece focusing with a 436.4-foot (133m) minimum distance, an interpupillary distance scale spanning 58mm to 74mm, and a diopter compensation range of -5 to +3.

Key Features of Nikon 25×120 Telescopic Binoculars with Fork Mount

Engineered for permanent installation at maritime checkpoints, naval watchtowers, and astronomical observation decks, this high-aperture Porro prism system delivers exceptional resolving power over vast distances. Nitrogen gas purging and IPX8 waterproofing protect the optical train against severe marine environments. The included balanced fork mount provides continuous 360-degree horizontal panning and smooth vertical tilt from horizon to high-angle sky tracking.

• 25x magnification with oversized 120mm objective lenses gathering high photon volume
• Traditional Porro prism architecture delivering authentic depth perception and optical contrast
• Fully multi-coated optical surfaces reducing internal scattering and chromatic aberrations
• 150.6-foot field of view at 1000 yards (50m at 1000m) with a 3.0-degree actual angular field
• Long 18.9mm eye relief paired with a 4.8mm exit pupil for full-aperture viewing comfort
• Individual eyepiece helical focus with a -5 to +3 diopter compensation range
• Nitrogen-filled IPX8 waterproof housing resistant to salt fog, driving rain, and water immersion
• Balanced fork mount facilitating 360-degree horizontal rotation and -30 to +70 degree altitude elevation

Large-Aperture Porro Prisms & High-Transmission Optics

The 120mm clear objective lenses deliver massive light-gathering power, yielding a relative brightness index of 23.04 that resolves subtle ship markings at sea or faint star clusters in astronomical use. Fully multi-coated optical glass elements minimize light reflection losses across the visible spectrum, maintaining faithful color separation and edge sharpness. The wide 75-degree apparent field of view allows operators to track moving aircraft, migrating marine life, and low-earth satellites across broad expanses without repositioning fatigue.

Corrosion-Resistant Cast Aluminum Chassis & Heavy-Duty Fork Mount

Fabricated from heavy-duty cast aluminum alloy coated with an anti-corrosion protective finish, the housing withstands long-term exposure to salt air, high humidity, and extreme weather. The chassis is purged with dry nitrogen gas to prevent internal lens condensation during abrupt temperature shifts between sunny days and cold nights. The solid fork mount balances the 14 kg optical head, enabling precise tracking along horizontal and vertical axes with smooth friction locks that hold the binoculars securely on designated horizon markers.

• Helical individual eyepiece focusing delivering pinpoint depth-of-field control and dioptric balance
• IPX8 immersion-proof nitrogen-purged housing engineered for harsh coastal environments
• Heavy-duty fork mount supporting 360-degree azimuth rotation and -30 to +70 degree elevation ranges

Nikon Sports Optics Warranty Coverage & In-Box Inclusions

The Nikon 25×120 Telescopic Binoculars with Fork Mount are supported by Nikon limited warranty coverage against manufacturing defects in materials and assembly. The complete factory package contains the Nikon 25×120 optical body, balanced fork mount assembly, protective objective lens caps, eyepiece rain guards, and heavy-duty transport packaging.