Hawke Frontier HD X Full-Size Binoculars - 8x42 - High performance lens coatings and Dielectric Coated prisms ensure the highest level of light transmission. Features Dielectric Coatings High Resolution Phase Corrected BAK-4 Roof Prisms Water Repellent Lens Coatings Magnesium Alloy Chassis Focus From 3m Replaceable Twist-Up Eye Cups With Position Stops Stay-On Lens Covers Nitrogen purged. Waterproof. Fog proof. Hawke No-Fault Lifetime Warranty.