The Viper HD R/T tactical binocular combines award-winning optics and tactical features to create a tough, durable roof prism binocular—reliable in the worst conditions. Now with HD extra-low dispersion glass objective lenses to further enhance resolution and deliver the true-to-life color accuracy required for identifying targets at long distances in low light. And, with the R/T ranging reticle, featuring four silhouettes to serve as a secondary ranging aid, you can easily range objects of known dimensions. Vortex Viper HD 10x50 Tactical Binocular V105RT-HD