20-60x80 WP Naturescape, ED Glass, Straight, Phase Coated, Fully Multi-Coated, W/Premium Hard Case. 100% waterproof and fogproof, extendable glare reducing sun-shade, BAK4 prisms and fully multi-coated premium ED (Extra Low Dispersion) glass provide you with views of exceptional clarity and resolution. Compared to conventional achromatic lenses, ED glass lenses minimize chromatic aberration and other forms of distortion resulting in higher resolution and contrast. This Naturescape ED spotter is at home in the most demanding environments and is ruggedly built to withstand the effects of movement from one location to another. Limited Lifetime Warranty.