Upright Metallurgical microscopes has  superior coaxial course and fine focusing tension adjustment knobs helps in better examination of samples.Optical System=infinity-optical-system-bright-field; Viewing Head=seidentopf-trinocular-head-inclined-at-30-deg;interpupillary-distance-48-to-75-mm; Reflected Illumination=24-v-100-w-; Working Stage=maximum-sample-height-50-mm;moving-range-74-times-50-mm;specimen-preparation-plate-slide-glass;Shop Online at Labtron.us