The Arca-Swiss base attaches easily to compatible tripods without needing an adapter plate; Leupold’s Professional-Grade Optical System offers unmatched light transmission that’s designed to outperform in the most challenging lighting conditions; Exterior lens surfaces are treated with DiamondCoat 2, an ion-assist lens coating, for higher light transmission and the greatest level of abrasion resistance; Leupold’s fully multi-coated lens system ensures maximum brightness for clarity, contrast, and color fidelity; High-definition, calcium-fluoride lenses ensure incredible clarity at all magnification levels; Phase coated roof prisms significantly increase resolution for a sharp sight picture from edge-to-edge of the visual field; The durable housing is shrouded in a easy-grip rubber armor coating that provides a positive grasp in all conditions; All-day glassing comfort with increased contact area, and a flexible ergonomic design; Features an extremely smooth focusing system for fine adjustments; Features twist-up eyecups and generous eye relief for comfortable extended viewing