The Athlon Ares 7.5-22.5x50 ED 45Degrees Spotting Scope is designed with advanced optical quality and ease ofuse on top of mind. So, when you are trying to collect that trophy of alifetime, your spotting scope is one thing you dont have to worry about. Thetask is as easy as optically possible with bright, razor-sharp imagery and arugged, weatherproof design thats ready for any condition. It has ED glasslenses for color resolution and contrast. It also comes with AFMC (AdvanceFully Multi-Coatings) and features BaK4 prisms with the ne.w ESP DielectricCoating. It brings super-premium clarity and brightness within the reach ofmost avid enthusiasts. The tough chassis is fog proof and waterproof and filledwith Argon gas to prevent internal fogging and for better thermal stability.The lens is then treated externally with our XPL coating to withstand dirt, oil,and grime of constant use as well as stand up to the harshest weatherconditions. Choose from three different models each distinctly different insize so you have a scope tailor-made for your specific activity.- Extremely Compact and Lightweight- 45 Angled Viewing- 7.5-22.5x Zoom Eyepiece- 50mm Objective Lens- Dielectric Coated BAK4 Prism System- Apochromatic Extra-Low DispersionLens- Protective XPL Exterior Lens Coatings- Argon-Filled, Waterproof, and Fogproof- Durable and Lightweight AluminiumBody- 1/4"-20 Mount, Rotating TripodCollarMagnification: 7.5 - 22xOBJECTIVE LENS DIAMETER: 50 mmField of View: 265 - 116' @ 1000 yd /88 - 39 m @ 1000 mMinimum Focus Distance: 4 mEye Relief: 19.1 - 16.0 mmExit Pupil Diameter: 6.7 - 2.2 mmFilter Thread: No ne.weatherproofing: Argon-filled,waterproof, and fog proofDimensions: 17.5 x 5.8 cmWeight: 18.9oz