Fujinon 10×50 FMTR-SX Polaris Binoculars

Description

Featuring integral field-flattening lenses, the Fujinon 10×50 FMTR-SX Polaris Binoculars provides a 341.2-foot field of view at 1000 yards (6.5-degree actual). The 5mm exit pupil and 20mm eye relief deliver relaxed viewing with spectacles. Weighing 50.09 ounces (1.42 kg), this heavy optical platform requires strong arms or a tripod adapter during extended observation.

Field flattener elements pair with high-density BaK-4 Porro prisms treated with proprietary Electron Beam Coating (EBC) multi-layers for maximum light throughput. Clad in thick black rubber armoring, the aluminum housing measures 8.9 by 3.2 by 7.9 inches at 50.09 oz (1420.05 g). Nitrogen purged and waterproof to military specifications, it utilizes individual eyepiece helical focusers working to 29.53 feet (9 m), fold-down rubber eyecups, and front tripod threading.

Key Features of Fujinon 10×50 FMTR-SX Polaris Binoculars

A reference-grade observation binocular engineered for commercial mariners, military surveillance teams, and dark-sky astronomy enthusiasts. Field flattener lenses eliminate peripheral distortion, while traditional Porro prisms deliver high stereoscopic depth across open water and star fields.

• 10x magnification combined with 50mm objective lenses producing a 5mm exit pupil
• High-density BaK-4 Porro prisms with integral field flattener lens elements
• Proprietary Electron Beam Coating (EBC) providing over 95 percent light transmission
• 341.2 ft field of view at 1000 yd (6.5-degree actual angle)
• Extended 20mm eye relief with soft fold-down rubber eyecups
• Individual eyepiece focus system eliminating center-bridge flex and slop
• Nitrogen gas purged aluminum chassis built to military specifications (50.09 oz)
• Submersible waterproof construction sheathed in heavy black rubber armor

Field Flattener Optics & Low-Light Transmission

Fujinon’s field flattener elements eliminate astigmatism and field curvature, preserving pin-sharp resolution right to the circular field stops. EBC multi-coatings channel maximum light throughput across the spectrum, cutting glare and revealing subtle target details across dark waters and astronomical star clusters.

Individual Focus & Heavy Armor Mechanics

Independent helical focus collars let you adjust each ocular once to infinity, eliminating mechanical drift from boat vibrations or rough transport. The thick rubber armor deadens contact noise against boat rails, while the nitrogen-pressurized aluminum housing resists saltwater corrosion over decades of service.

• Individual eyepiece focus system holds permanent focus from 30 meters to infinity
• Nitrogen-filled seals prevent internal lens condensation during sudden marine temperature drops
• Heavy cast-aluminum frame isolates internal prisms from mechanical shock and drop impact

Fujinon Lifetime Warranty & Marine Package

Fujinon covers this marine binocular with their Lifetime Limited Warranty against defects in materials, craftsmanship, and optical alignment. The complete factory package contains the Fujinon 10×50 FMTR-SX Polaris Binoculars, heavy-duty padded neck strap, protective soft carrying case, objective lens covers, eyepiece rainguard, and an instruction manual.