Body: Monocular Fixed straight Tube. Mechanical Tube length 160 mm Nosepiece: Triple revolving nosepiece with positive centering and click stops Focusing: Separate knobs are provided for coarse and fine focusing adjustments. Coarse adjustment can be made through Rack-Pinion and fine movement by screw-lever mechanism. Objectives: Achromatic 5X, 10X & 45X SL Eyepieces: Huygenian 10X and 15X