Eyepiece LVW-5mm Rare-Earth Lanthanum Glass Magnification; 2000mm=400X 1000mm=200X 500mm=100XDesign; 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
