... /40x100 Long-Range Observation Binocular, with 100mm semi-apochromat triplet objectives (each objective is 4" in diameter!), 25/ ... 40x100 Long-Range Observation Binocular, with 100mm semi-apochromat triplet objectives (each objective is 4" in diameter!), and ... German and Chinese militaries. Technical specifications:Objective size : 100mm (triplet semi-apo) Magnification : 25x and 40x (5-element Erfle) ...