At the apex of Bushnell's Forge binocular family sits the 15X56. This high magnification binocular offers large 56mm objective lenses crucial for gathering light. The Forge Binocular features Bushnell's newest and best protective lens coating, EXO Barrier Protection to ensure your lens are resistant to water, oil, fog, dust, and debris. Adding to this protection Forge binoculars feature IPX7 Waterproof Construction that allows your optics to stay dry inside for up to 30 minutes when immersed in 3 ft of water and are Nitrogen Purged to prevent fog. The Forge Series binoculars use Multi-Coated lenses that include Ultra Wide Band, Dielectric Prism, and PC-3 Prism Coatings that ensures optimal resolution and contrast even in low-light situations. The extra-low dispersion ED Prime glass also allows the Forge binocular to deliver superior color while preventing chromatic aberration so no detail goes unnoticed. Features of Bushnell Forge BinocularsBaK 4 Abbe Koenig Prism Nitrogen Purged; Fog ProofingExtra-Low Dispersion ED Prime GlassEnvironmentally Friendly Lead Free GlassEXO Barrier and IPX7 Waterproof ConstructionDielectric Prism, Ultra Wide Band, and PC-3 Prism Phase CoatingIncluded: Binocular Tripod Adapter, Premium EVA Foam Case, Premium Harness, and NeckstrapFor an in depth product manual with binocular adjustments, cleaning and care, and more, check here. Bushnell Tactical Bushnell Forge 15x56mm Abbe Koenig Prism, Terrain ED Prime, UWD, EXO Binoculars BF1556T