Ozumi Tokyo Monocular Compound Microscope Unitron Ke15X Camera Port 4 Objectives

Ozumi Tokyo Monocular Compound Microscope Unitron Ke15X Camera Port 4 Objectives

This is a vintage Ozumi Tokyo upright monocular compound microscope, a Japanese-made instrument assembled with a mixed set of objectives from Unitron, Bausch & Lomb, and Ozumi. The microscope features a four-position rotating nosepiece, a side-projecting camera port, a substage mirror for illumination, and a coarse/fine focus rack with approximately 40mm of travel. The eyepiece tube accepts 23mm-diameter eyepieces and a 23mm camera port adapter is also present.

Specifications & What's Included

• Brand: Ozumi, Tokyo, Japan
• Type: Upright monocular compound microscope
• Eyepiece: Unitron Ke15X (15X magnification, blue-coated optics)
• Eyepiece tube: 23mm diameter, 50mm deep
• Nosepiece: 4-position rotating
• Objective 1: Apochromat 10X
• Objective 2: Bausch & Lomb 40X (gold-banded)
• Objective 3: Ozumi M45
• Objective 4: Unitron Coated MPL80X — NA 0.90, T.L. 170 (silver-barrel)
• Focus block travel: approximately 40mm (coarse and fine focus knobs)
• Camera port: 23mm diameter, 40mm deep — accepts standard 23mm photo/camera adapters
• Illumination: Adjustable substage mirror (no built-in lamp)
• Stage: Flat mechanical stage with slide controls
• Base: Horseshoe-style cast base

Applications

Ozumi was a Japanese optical instrument manufacturer active from roughly the 1950s through the 1970s, producing compound microscopes sold under both its own name and through OEM partnerships with Unitron Instrument Company, a major American distributor of Japanese optics during that era. Instruments like this one were standard equipment in university biology and histology labs, medical offices, and research settings throughout the 1960s and 1970s. Compound microscopes of this type use transmitted light (from the substage mirror or a lamp) and are used for viewing thin-section prepared slides — biological specimens, tissue sections, bacteria, or cellular samples — at magnifications from around 150X (10X objective × 15X eyepiece) up to 1200X (80X × 15X). The camera port allows a 35mm or digital camera adapter to be attached for photomicrography without removing the eyepiece. This configuration of mixed objectives — apochromat, achromat, and flat-field — was typical of general-purpose research instruments of the period. Today these vintage Ozumi/Unitron instruments are sought by collectors, educators, and hobbyists who appreciate their solid brass-and-steel construction, coated Japanese optics, and compatibility with the still-standard 23mm DIN eyepiece diameter.