... , high quality at basis of reasonable price2.Main optical lens were made of imported material, to assure high clearance ... and brightness3.All lens has anti-reflecting, moisture-proof, and mildew-proof coating ... Magnification1.2X Eyepieces WF15XWidefield eyepieces WF15X, field number φ13mm Curvature radius5.5-11mm Diopter30-60D Least Graduateradius: 0.02mm, ...