The HOOP's ED lens are manufactured from top of the line glass. Simple design, useful in any situation, no matter the weather. These Compact Binoculars will deliver impressive scenes wherever you go.The ED Objective lens deliver sharp images with no false color. The ED (Extra Low Dispersion Glass) is used for the objective lens and is free from chromatic aberrations to the edge of the field of view.The HOOP Binocular utilizes three types of optical coating to deliver clear sharp images.Vixen's finest "flat multi_anti_reflection" coatings are on all surfaces. The prisms are phase coated to preven halation and increase resolution. In addition, high reflectivity dielectric coatings enhance the brightness of the images. The coatings eliminate stray light. The waterproof HOOP Binocular also features an oil repellent coating on the outer surfaces. This protects the outer lens surfaces and makes the binocular easy to clean.