Olympus CX23 Upright Microscope


The cost-effective CX23 student microscope is simple to use for even a first-time microscope user while delivering high-quality optical performance. Its unique features accommodate the student, provide easy and safe operation, and stand up to the rigors of an educational setting. The durable eyepieces, observation tube, objectives, and stage are designed so that they are protected from damage while lifting, carrying, setting and observing samples, and storing.

A Student Microscope with Outstanding Optical Performance

The CS23’s large field number (FN) of 20 offers a wider field of view. The built-in LED light source provides long-term uniform and stable illumination with low power consumption (20,000 hour lifetime), and its reduced blue color preserves the vivid colors of the sample.

Product Information (PDF Format)

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Diverse, User-Friendly Design Combined with Outstanding Optical Performance


  • Ergonomic grips add safety when retrieving the microscope from high places
  • Colored grips indicate appropriate places to hold the microscope
  • Smooth, rounded design eliminates all sharp edges
  • The CX23 is one of the lightest weight microscope in its class, with a total weight of approx. 5.9 kg (13.01 lbs)
  • The CX23 features a carrying arm angled to keep the wrists in a comfortable, neutral position
  • The eyepiece can be fixed in place to help prevent damage or loss when moved
  • A rackless stage and stage cover give safety and longtime operation


  • A locking pin keeps the observation tube in place
  • Interpupillary adjustment from 48 to 75 mm enables personalized comfort for individual users
  • Adjustable eyepoint provides greater comfort for users of different heights
  • Left and right diopter adjustment enable optimal focus for each eye
  • The inward-facing revolving nosepiece allows for more space above the stage, enabling the easy setting and exchanging of specimens or adding of oil for the immersion objective
  • Objectives have long working distances
  • The focusing knob offers durable movement with a coaxial design to enable precise coarse and fine focus control; as a result, the stage can be quickly brought into focus by either the left or right side knob
  • A torque release function prevents damage in case excess force is applied to the coarse focusing knob or stage knob


  • The focus lock prevents objectives and specimen from any damage
  • Field number (FN) of 20 ensures a wide field of view
  • The CX23 features plan achromat objectives that preserve outstanding image flatness throughout the field of view
  • The LED light source provides long service time—20,000 hours—and offers low power consumption
  • Also, its reduced blue color preserves vivid colors on HE staining


  • A storage compartment on the back of the CX23 makes it easy to stow the power cable after use
  • An optional dedicated wooden case is available
  • A built-in security slot allows attachment of an anti-theft cable to secure the CX23


  • Eyepieces (10X)
  • Field number (FN): 20 (anti-fungus)
  • Revolving nosepiece (built-in 4-position)
  • Plan achromat, anti-fungus objectives; 4X – 10X – 40X – 100X (Oil)
  • Aluminum die-cast metal frame, protective covering
  • Transmitted Köehler illuminator (LED lamp)
  • Abbe condenser; NA1.25/W.D. -(4X–100X), manual, built-in
  • Infinity optical system
  • Fixed quadruple nosepiece
  • 30° inclined binocular observation tubes
  • Interpupillary distance adjustment range: 48-75 mm
  • Eyepoint adjustment: 370.0 – 432.9 mm
  • Weight: 5.9 kg (approx.)
  • Dimensions: 198W x 259D x 384H mm
  • Rated voltage/electric current: AC 100-240 V  50/60 Hz  o.4A


  • Focusing mechanism: stage focus
  • Stage height movement (coarse handle movement stroke; 15 mm)
  • Coarse adjustment limit stopper
  • Torque adjustment for coarse adjustment knob
  • Fine focus knob (minimum adjustment gradations: 2.5 µm)


  • Wire movement mechanical fixed stage
  • Traveling range: 76 mm (X) x 30 mm (Y)
  • Specimen holder
  • Specimen position scale

Observations Methods

  • Brightfield
  • Darkfield


Product Applications

  • Biological
  • Environmental
  • Education

Optional Accessories

  • Reflection mirror
  • 15X eyepiece
  • Dedicated wooden case
  • Eyepiece micrometer

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