Professional microscope equipped with Color Corrected Plan Optical System to correct the chromatic aberration on the traditional optical system to improve optical performance and reliability. Features: Pair of high eye-point PL10X eyepieces with eye caps 30° inclined head rotatable 360° 132mm X 140mm graduated mechanical stage, 76mm x 50mm range of traverse 4 Plan achromatic objectives, 4X (N.A. 0.10),10X (N.A. 0.25), 40XR (N.A. 0.65) and 100XR oil (N.A.1.25) Swing out N.A. 1.2/0.22 achromatic condenser Built in Koehler illuminator systems Coaxial coarse and fine focusing tension control knobs Variable intensity halogen illuminator, 6V 20W wide range voltage transformer applied to use in 90V~240V outlets for international market Focusing, stage and light intensity knobs at your fingertips to minimize fatigue Replacement bulb, fuse and immersion oil Size: 8 X 13 X 15 (H) CE Replacement lamp: MA07 Shipping weight: 15 lbs. Optional Upgrade: PL15X or PL 20 high eye-point eyepiece Turret phase contrast set PL10X eyepiece compared with WF10X eyepiece: You dont need to take off your glasses to view with PL10X Greater wide field image: PL10X, Ø22mm; WF10X, Ø20mm Clearer: PL10 of lens distortion is 4%. Regular WF10X is 5.5% Why a swing-out condenser? The best aperture for lower power objectives (4X & 10X) is 0.22 and the best aperture for 40X and 100X is 1.20. Swing-out condenser is designed to fill both needs