"The 20-60x80 Viper HD straight spotting scope puts incredible viewing at your fingertips. Count on HD (High Density) extra-low dispersion glass for impressive resolution and color fidelity and XR fully multi-coated lenses for maximum brightness. Meet challenging conditions head-on with the superior fogproof and waterproof performance of the rugged Viper. Easily the best way to make your trophy selection without putting a mile on your boots, the high-performing Viper HD spotting scope has your name on it.|HD Lens Elements: HD (High Density) extra-low dispersion glass delivers impressive resolution and color fidelity, resulting in High Definition images|XR Lens Coatings: Vortex proprietary XR anti-reflective coatings, fully multi-coated on all air-to-glass lens surfaces, increase light transmission for maximum brightness|Porro Prism: Offers maximum image quality and performance in a traditional design|Straight Body Design: Valued for speedy target acquisition and ease of use. Most compatible design for use with car window mounts|Waterproof: Optics are sealed with O-rings to prevent moisture, dust and debris from getting inside the spotting scope|Fogproof: Argon gas purging guarantees superior fogproof and waterproof performance|ArmorTek; Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt|Twist Eyecup: Twists up and down for comfortable viewing with or without eyeglasses|Dual Focus: Allows for maximum focusing precision with both coarse and fine focus adjustments|Sunshade: Reduces glare and shields the objective lens from raindrops and snow|Rotating Tripod Ring: Allows rotation of the eyepiece to a sideways position - most useful for viewing through an angled spotting scope body on a car window mount|Picatinny Accessory Rail: Allows easy attachment of red dot type sights"