Hawke Frontier ED X Full Size Binocular - 8x42 - High performance lens coatings and Dielectric Coated prisms ensure the highest level of light transmission. ED X models benefit from Extra-low Dispersion glass for controlled chromatic aberration and the elimination of color fringing. Features Extra-Low Dispersion (ED) Glass; Dielectric Coatings; High Resolution Phase Corrected BAK-4 Roof Prisms; Water Repellent Lens Coatings; Magnesium Alloy Chassis; Focus From 2m; Replaceable Twist-Up Eye Cups With Position Stops; Stay-On Lens Covers; Nitrogen purged. Waterproof. Fog proof.; Hawke No-Fault Lifetime Warranty.;