The PROSTAFF 5 Fieldscope offers a wide field of view and superb viewing in all conditions .It is engineered for precision and high magnification capability. Fully multicoated lenses and prisms provide you with superb brightness. Features 82mm Objective Lens. 20-60 Zoom eyepiece. Straight or Angled Body. Fully Multicoated Optics. Ergonomic, Lightweight Porro Prism Design. Internal Surface Texturing. Built-in Sliding Sunshade. Waterproof/Fogproof.