Check the listing for details. Vortex Optics Viper HD 11-33x50 Spotting Scope - Straight. Condition: New. Listed at 849.99 USD. Viper HD Straight Mobility gives every hunter a tactical advantage in the field, and this incredibly versatile spotting scope is made for hunting on the move. Light, compact, and built on an Arca-Swiss compatible foot, the Viper® HD 11-33x50 mounts and stows quickly. Dual focus knobs get you precisely the view you need to pick shooters out of the herd or the habitat. Powered by exceptionally clear HD Optical System, this is the spotter you need for that destination hunt, and to keep you moving closer to home. FeaturesHD Optical SystemOptimized with select glass elements to deliver exceptional resolution, cut chromatic aberration, and provide outstanding color fidelity, edge-to-edge sharpness, and light transmission.XR™ Plus Lens CoatingsUltimate anti-reflective coatings on all air-to-glass surfaces provide maximum light transmission for peak clarity and the pinnacle of low-light performance.Dielectric Prism CoatingsMulti-layer prism coatings provide bright, clear, color-accurate images.Armortek®Ultra-hard exterior lens coatings defend against scratches, oil, and dirt.Rubber ArmorProvides a secure, non-slip grip, and durable external protection.Argon Gas PurgedGas purged and O-ring sealed for superior fogproof and waterproof performance in the most extreme conditions.WaterproofDesigned to withstand harsh weather conditions.FogproofDesigned to withstand a wide range of temperatures.ShockproofDesigned to withstand impact.Tripod AdaptableArca-Swiss adaptable. Allowing use on a tripod or car window mount. Included in the BoxNeoprene CaseTethered Lens CoversLens ClothSpecsMagnification11-33xObjective Lens Diameter50 mmLinear Field of View182' - 95' @ 1000 yds.Angular Field of View3.5º - 1.8ºEye Relief16.0mm - 19.0mmLength11.0"Weight27.4 oz.Close Focus9.0'