The 12-36x50 WP Naturescape ED Spotting Scope is 100% waterproof and fogproof and features an extendable glare reducing sun-shade that is set back in the housing to allow the sun shade to cast a shadow and reduce glare for use in bright sun. The stunning 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 Spotting Scope is at home in the most demanding environments and is ruggedly built to withstand the effects of movement from one location to another.