DESC: Added to the mechanical features and the optical formula of the famous #804 is an ED (Extra low Dispersion) air spaced objective lens and redesigned shower-proof ocular cells, adding a notch to superior performance and dependability. this glass also has BAK-4 prisms, fully multi-coated five lens oculars and retractable rubber eye-cups. Perfect for resolving those fine color distinctions. Complete with padded Cordura case and broad woven binocular neck strap. ED glass provides exceptional, precise color definition, while promoting optimum resolution and sharpest possible images. It even further expands the viewing capabilities of fine optics.