The Optika B-510POL comes standard with a trinocular viewing head. It is ideal for geological and other applications that require polarized light. It comes with a pair of 10x eyepieces that provide a 22mm field of view, one contains a crosshair reticle. The bertrand lens module has a swing-out centering mechanism for observation in conoscopy/orthoscopy. It has a rotatable analyzer and times with a 1st order red plate, λ/4, and quartz wedge. The quintuple nosepiece is centering and comes with IOS W-Plan POL 4, 10x, 20x, and 40x objectives. The rotating stage comes with two stage clips. The condenser is Swing-out N.A. 0.2/0.9, with iris diaphragm, focusable and centerable, with rotating polarizing filter. The X-LED3 LED illumination provides smooth and even illumination without having to worry about any bulb changes! The microscope comes with Optika's unmatched 10 year mechanical warranty and 2 year electrical warranty. Optika B-510POL Trinocular Polarizing Specifications: Head: Trinocular (fixed 50/50), 30° inclined, 360° rotating. Eyepieces: WF10x/22 mm, high eye-point. One with crosshair. Bertrand Lens: Swing-out type with centering mechanism for observation in conoscopy/orthoscopy. Rotatable analyzer from 0° to 90° with graduated scale.Tint plates: 1° order red (λ); λ/4; Quartz wedge. Nosepiece: Quintuple revolving nosepiece, rotation on ball bearings. Centering system for each objective. Objectives: - IOS W-PLAN POL 4x/0.10– IOS W-PLAN POL 10x/0.25– IOS W-PLAN POL 20x/0.45– IOS W-PLAN POL 40x/0.65 Condenser: Swing-out N.A. 0.2/0.9, with iris diaphragm, focusable and centerable. With rotating polarizing filter Stage: Rotatable stage with locking mechanism and centering knobs. Vernier scale with accuracy 0.1 mm. Diameter 145 mm. Specimen slide clamps. Focusing: Coaxial coarse (adjustable tension) and fine focusing mechanism with limit stop to prevent the contact between objective and specimen. Illumination: X-LED3 with white 3.6 W LED (6.300 K) with brightness control. Multi-plug 100-240Vac/6Vdc external power supply Accessories: Dust cover, immersion oil & instruction manual included Warranty: 10 Year Mechanical & 2 Year Electrical Brochure Optika B-510POL Brochure