BaK-4 Prisms with Phase and Dielectric Coatings: Increased light transmission through the prism system for brighter images. Increased contrast and resolution. Magnesium Alloy Body: Lightweight, durable frame that will last a lifetime and handle use in the field. 6.5' Close Focus: Detailed, up close observation of subject in close proximity Fully Multi-Coated Optics: delivers crisp, high contrast images with accurate color reproduction. Wide Field of View: The larger viewing area allows the subject to quickly acquire subject and move within the viewing area without constant movement of the binocular.