The Fujinon Polaris 7x50 FMTR-SX2 Binoculars are premier marine and astronomical optics trusted by commercial captains, military forces, and dedicated star-gazers worldwide. This upgraded SX2 model incorporates a flat, ultra-efficient field flattener lens design that actively squares off edge distortion to present a sharp, blur-free picture across an expansive 7.5-degree field of view. The large 50mm objectives produce an incredibly bright 7.1mm exit pupil that perfectly matches the human eye's maximum dark-adapted dilation, providing rock-steady, bright tracking even on rolling ocean waves or pitch-black horizons. All optical elements feature multi-layered Electron Beam Coating (EBC) to achieve a spectacular 95 percent light transmission rating while filtering out harsh ghosting and daytime glare. Encased in a completely waterproof, nitrogen-purged chassis layered with updated shock-absorbing rubber armor, this individual-focus instrument keeps fine dust, salt spray, and extreme condensation completely locked out. Fujinon Polaris 7x50 FMTR-SX2 Waterproof Binoculars w/ Lens Multicoating, Rubberized Body, Field Flattener Lenses 16330574, Full-Porro prism