Extreme climate tested to outperform in all conditions, the highly versatile SX-4 Pro Guide HD Gen 2, 20-60x85mm features Diamond-Coat, scratch-resistant lenses with Guard-ion lens coating that sheds dirt, water and smudging for greater HD resolution and clarity across the magnification range. Other upgrades include the Arca Swiss tripod adapter for a quick and secure setup and FormFit, interchangeable eyecups for all-day comfort. This rugged spotter is a must have for any serious hunter or shooter who's looking for a little more magnification and HD performance that is guaranteed to perform for life.