The Fujinon Polaris LB150 15x80 MT Binoculars are heavy-duty, military-specification optics engineered primarily for permanent seacraft mounting, commercial fishing vessels, and dedicated astronomical observation. This professional-grade Porro prism system incorporates massive 80mm objective lenses that provide exceptional low-light light-gathering capabilities, making them a favorite for tracking deep-sky comets or indexing distant coastlines at deep twilight. Every internal and external air-to-glass surface is treated with Fujinon's proprietary Electron Beam Coating (EBC) multi-layer antireflective film to maximize light transmission and guarantee razor-sharp image contrast. Built to survive severe open-ocean climates, the rugged housing is completely airtight, nitrogen-purged, waterproof down to two meters, and heavily corrosion-resistant against harsh saltwater degradation. The dual eyepieces rely on an individual lens focusing configuration with specialized angled rubber eyecups that effectively shield the user's vision from distracting stray peripheral light. Fujinon LB150 15x80 MT Water Resistant Binoculars w/ Lens Multicoating, Individual Lens Focus 16330146, Large-Format high-aperture structural