Among the world's greatest binoculars for boating or astronomy applications, the military-specification Fujinon 7x50 FMT-SX Polaris Binoculars transmit an incredible >95% of the light reaching the binoculars and have Fujinon's EBC multi-coatings on every optical surface. They are equipped (as are all Fujinon Polaris series binoculars) with flat-field, distortion-free eyepieces that accept optional filters and are ideal for astronomy applications. The 100% fogproof and waterproof 7x50 Polaris binoculars withstand drastic temperature and humidity changes with ease, have abundant eye relief for use with sunglasses in bright conditions, and are simply the brightest, highest-resolution 7x50 boating binoculars money can buy.