Technical specification stand stable & robust, traditional horse shoe base. body inclined through 90 deg, standard tube length of 160 mm focusing separate coarse and fine focusing knobs with graduation on one side. Coarse movement by rack & pinion and fine movement by screw lever mechanism. nose-piece triple revolving nose-piece is provided with positive click stop for proper centering. stage fixed square stage 125 x 125 mm with stage clips to hold the slide. illumination illumination through a 50 mm diameter Plano concave mirror mounted on gimbals mount. objectives two achromatic objectives of 10x & 40x (sl) eyepieces two huygenian eyepiece of 6x, 10x, or 15x condenser sub stage abbe condenser with N. A. 1. 25 . Iris diaphragm and filter holder are mounted with the condenser.