Turn your Viper HD 85mm spotting scope into the perfect optical measuring stick for range work and spotter-to-shooter communication. A fixed magnification of 33.5x gives you all the power you need, and the eyepiece has a diopter ring and the ability to rotate the reticle to level it with the horizon line, allowing you to dial the eyepiece to your eye and your shooting scenario. XR and ArmorTek lens coating keep your view through the HD optical system crystal clear. Only compatible with Viper HD 85mm models.