Condition: Used — For parts or not working

Olympus CH20 BIMF200 binocular compound microscope supplied with a full set of four NEA achromatic objectives. The unit powers on but is in poor cosmetic condition. The eyepiece is missing. Supplied as described.

Included with this unit:
• Olympus CH20 BIMF200 microscope body
• NEA 4X/0.10 objective
• NEA 10X/0.25 objective
• NEA 40X/0.65 objective
• NEA 100X/1.25 oil immersion objective

The Olympus CH20 is a binocular biological compound microscope designed for educational and entry-level clinical laboratory applications. It combines high optical and mechanical quality with an economical, accessible design suitable for student and routine microscopy use. The slim-body stand allows comfortable coarse and fine focus operation with hands resting on the desk.

The CH20 BIMF200 configuration features a binocular (BI) observation head with 45° inclination and interpupillary distance adjustment. It is fitted with a quadruple revolving nosepiece accepting standard RMS-threaded, 160mm tube length objectives. The standard NEA achromatic objective set provides a magnification range from 4x through to 100x oil immersion. An Abbe condenser with NA 1.25 and aperture iris diaphragm is included, along with a built-in transmitted light illuminator.

Objective Specifications (NEA Achromat Series):
Objective Type: NEA Achromat (finite, 160mm tube length)
Mount: RMS thread (20.32mm diameter, 0.706 pitch)
Tube Length: 160mm

NEA 4X:
Magnification: 4X
Numerical Aperture (NA): 0.10
Cover Glass Thickness: - (uncovered)

NEA 10X:
Magnification: 10X
Numerical Aperture (NA): 0.25
Cover Glass Thickness: 0.17mm

NEA 40X:
Magnification: 40X
Numerical Aperture (NA): 0.65
Cover Glass Thickness: 0.17mm

NEA 100X (Oil):
Magnification: 100X
Numerical Aperture (NA): 1.25
Immersion Medium: Oil
Cover Glass Thickness: 0.17mm

Microscope General Specifications:
Model: CH20 BIMF200
Observation Head: Binocular, 45° inclination
Interpupillary Distance: 53–75mm
Diopter Adjustment: Left eyepiece
Nosepiece: Quadruple revolving (fixed)
Condenser: Abbe condenser, NA 1.25, with aperture iris diaphragm
Illumination: Built-in transmitted light (halogen)
Focus: Coaxial coarse and fine adjustment knobs
Stage: Mechanical stage with XY movement
Tube Length: 160mm (finite optical system)
Applications: Education, clinical laboratory, biological specimen examination, routine microscopy

Olympus CH10/CH20 Biological Microscope Repair Manual (PDF): Download PDF

Olympus CH20i Biological Microscope Brochure (PDF): Download PDF

Olympus CH Series System Microscope Repair Manual (PDF): Download PDF

Olympus High Quality Micro Optics — Objectives and Accessories Catalogue (PDF): Download PDF

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