KRUGER Caldera 10x42 Field of View Roof Prism Binocular H2C Lens Coating: Our patented hard, hydrophobic lens coating repels water while providing hardcoat protection. This coating improves foul-weather visibility while extending the life of your lenses. Lightweight-rugged Magnesium body with Extra-Wide Field of View Fluorite Low Desipertion Objective Glass with BBAR Coating and Long Eye-Relief Phase Coated Bak-4 Prisms Water-Proof, Fog-Proof, and Nitrogen Processed