The POLARIS series offers six models and are the pinnacle of performance with a reputation of providing outstanding optics at a reasonable cost. FUJINON POLARIS series binoculars offer superb optical performance and value. The FUJINON POLARIS series binoculars deploy FUJINON'S unique EBC coating, allowing 95% light transmission. With our field flattener lens, we offer edge to edge sharpness free of any discernible astigmatism or distortion.Built to U.S. military specifications for optical performance, waterproofness and durability, these are among the very best marine binoculars made. Lenses and prisms are made with Fujifilms exclusive rare-earth glass formulations featuring a proprietary zirconium oxide Electron Beam Coating (EBC) process that enables them to transmit an incredible 95% of the light striking the objective lenses, a critical advantage in low light, such as at dawn and dusk.The rubber-armored housings are a lightweight, aluminum alloy—not plastic. Flat field” lenses eliminate all visible distortion and astigmatism from the center to the edges for excellent edge-to-edge sharpness. 23mm eye relief provides a complete image even if you wear glasses. Nitrogen-filled, 100% waterproof. A comfortable padded neckstrap is included.Magn. x Objective Lens Dia.: 7 x 50Focus: IndividualWaterproof: YesPrism Type: BAK-4 PorroField of View @1000yds: 430'Light Transmission Efficiency: 95%Eye Relief: 23mmCompass: NoRangefinder Reticle: NoWeight: 52oz.Warranty: Limited lifetime