Observation mode: Brightfield, simple polarized light on incident light. Epi-illumination and polarizing filters: Halogen 12 V/50 W with brightness control. With aperture and field (centrable) diaphragms. With polarizer and analyzer. Head: Trinocular (2-position 100/0, 50/50), 45° inclined. Interpupillary distance: Adjustable between 50 and 75 mm. Dioptric adjustment: On the left eyepiece tube. Eyepieces: WF10x/22 mm, high eye-point and with rubber cups. Nosepiece: Quintuple revolving nosepiece, rotation on ball bearings. Objectives: IOS LWD U-PLAN MET 5x/0.15 IOS LWD U-PLAN MET 10x/0.30 IOS LWD U-PLAN MET 20x/0.45 IOS LWD U-PLAN MET 50x/0.75 All with anti-fungus treatment. Specimen stage: Fixed stage, 250×160 mm, with metal stage insert. Focusing: Coaxial coarse (adjustable tension) and fine focusing mechanism with limit stop to prevent the contact between objective and specimen.