Vortex has significantly step up their game in 2011. The new Vortex Viper Binoculars with HD (High Density) extra-low dispersion glass is just one enhancement. One look is all you'll need to appreciate why the Viper is an award-winning bino. Add XR fully multi-coated lenses and you have a binocular that delivers bright, crisp details with impressive resolution and color fidelity. Rugged, compact and lightweight — Viper HD Binoculars are one of the lightest full-size binoculars available today.