Multi-viewing biological microscope is designed to observe single specimen by several people together at the same time. Its swing condenser, coarse and fine focusing knobs, C-mount video adaptor FOR viewing sharp and clear images of the specimen.Optical system=infinite-optical-system; Viewing Head=compensation-free-trinocular-head-inclined-at-30-deg-360-deg-rotable-interpupillary-distance-48-75-mm;compensation-free-binocular-head-inclined-at-30-deg-360-deg-rotable-interpupillary-distance-48-75-mm-1-pcs; Eyepiece=extra-wide-ew10x-20mm-4-pcs; Focusing=coaxial-coarse-amp-fine-0-001-mm; Objective=infinite-4x-10x-40x-s-100x-s-oil;Shop Online at Labtron.us