B1-211E-SP (4X, 10X, 40X) Monocular head, 45º inclined, 360º rotating Widefield eyepiece WF10X/18mm Quadruple revolving nosepiece Semi-Plan objectives SP 4X 10X ,40X S Coaxial coarse and fine focusing system with tension adjustment Built-in low posi 1 * 1 items