The 17mm LVW eyepiece is designed to give you moderate magnification with an incredibly wide field of view. Rare-Earth Lanthanum Glass Magnification; 2000mm=118X 1000mm=59X 500mm=29XDesign; 8 Elements in 5 Groups; 20mm Eye-Relief;, 65deg Apparent Field of View; 1.25Lbs , Boxed 5.5 x 2.5 x 2.5 inches
