Olympus CX31 Binocular Biological Microscope Plan/S.Plan Objectives 4x-100x Used

The Olympus CX31 (Model CX31RBSFA) is a highly regarded compound microscope designed for demanding clinical, medical, and educational laboratory environments. Built around Olympus's advanced UIS2 (Universal Infinity System) optical system, this microscope delivers outstanding image clarity, high contrast, and excellent flatness across the entire field of view. The built-in halogen illumination system provides bright, consistent light that is easily adjusted via the side-mounted intensity dial, ensuring optimal viewing even at high magnifications or with dense specimens. Featuring a sturdy, ergonomic design, a Siedentopf binocular head, and a smooth wire-driven mechanical stage, the CX31 offers superior reliability and comfort for prolonged daily use.

Condition Used/Inspected. Please note: This microscope is a used item. It has been meticulously inspected and tested to confirm full mechanical and optical functionality. The coaxial coarse and fine focusing controls, as well as the mechanical stage movements, operate smoothly. The halogen illumination system powers on reliably and responds accurately to the intensity dial. Cosmetically, the unit is in very good condition, displaying only standard, minor signs of prior laboratory wear (as shown in the photos). The included Olympus objectives (a mix of Plan, PlanC, and S.Plan) have been visually verified; the lenses are clear with no scratches or fungal growth that would impact optical performance.

Specifications

• Model: Olympus CX31 (CX31RBSFA)
• Serial Number: 3G00458
• Optical System: UIS2 Infinity optical system (∞)
• Observation Tube: Siedentopf binocular tube
• Illumination: Built-in transmitted halogen illumination system (100-120/220-240V~ 50/60Hz) with intensity control dial
• Focusing: Coaxial coarse and fine focus knobs with tension adjustment
• Stage: Right-hand wire-driven mechanical stage
• Nosepiece: Fixed quadruple inward-facing nosepiece

Included Objectives & Eyepieces (As Photographed)

• (2) Olympus 10x Eyepieces
• (1) Olympus PlanC Objective 4x / 0.10
• (1) Olympus Plan Objective 10x (Yellow band)
• (1) Olympus S.Plan Objective 40x / 0.65 ∞ / 0.17 / F=200 WD 0.75
• (1) Olympus PlanC Objective 100x / 1.25 Oil

Included in Box

• Olympus CX31 Microscope Stand (SN: 3G00458)
• Olympus Binocular Head
• (2) 10x Eyepieces
• (4) Olympus Objectives (4x, 10x, 40x, 100x Oil as detailed above)
• Standard Power Cord