Olympus U-CT30 Centering Telescope

In stock

SKU: N5728900

$260.00
$260.00 $363.00 save $103.00
The Olympus U-CT30 is a genuine OEM phase contrast centering telescope that replaces one eyepiece during phase contrast alignment, allowing the user to directly view and center the phase annulus and phase ring for optimal contrast — an essential tool for any Olympus microscope equipped with phase contrast optics.

KEY FEATURES

  • Phase contrast centering telescope — enables direct visual alignment of condenser annulus to objective phase ring
  • 30mm eyetube diameter — fits all Olympus microscopes with standard 30mm eyetubes
  • Essential for phase contrast setup — required for proper alignment to achieve maximum contrast and artifact-free imaging
  • Genuine Olympus OEM — part no. N5728900 (2-U933), made in Japan, new/open box condition
  • University purchase orders accepted
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Product Overview

The Olympus U-CT30 centering telescope is an indispensable alignment tool for phase contrast microscopy. In a phase contrast system, the condenser annulus must be precisely centered within the objective’s phase ring to produce the characteristic high-contrast, halo-free image of transparent specimens. Misalignment results in reduced contrast, asymmetric halos, and imaging artifacts that can obscure fine specimen detail or lead to misinterpretation. The U-CT30 is inserted into one eyepiece tube in place of the standard eyepiece, allowing the user to directly observe the back focal plane of the objective and visually align the condenser annulus to the phase ring using the condenser centering screws. This procedure is quick, straightforward, and must be repeated whenever the objective or condenser is changed. The 30mm barrel diameter fits all Olympus microscopes with standard 30mm eyetubes, including BX, CX, IX, and other series. Supplied as a genuine Olympus OEM component (part no. N5728900 / 2-U933) in new/open box condition.

Technical Specifications

Manufacturer Olympus
Model U-CT30
Part Number N5728900 (2-U933)
Type Phase Contrast Centering Telescope
Eyetube Diameter 30 mm
Compatible Systems All Olympus Microscopes with 30mm Eyetubes (BX, CX, IX and others)
Country of Origin Japan
Condition New / Open Box

Microscope Compatibility

Typical Applications

Phase contrast condenser annulus alignment on Olympus BX, CX, and IX series microscopes
Initial setup and calibration of phase contrast systems after objective or condenser changes
Core facility and shared instrument labs maintaining multiple phase contrast microscopes
Teaching and training labs demonstrating phase contrast alignment procedures
Replacement of missing or damaged centering telescopes on Olympus 30mm eyetube systems

  • Designed for Mixed-Brand Lab Environments

    Olympus, Nikon, Zeiss, Leica components in one place

  • Quality-Verified New & Pre-Owned Equipment

    Professionally sourced and verified for performance

  • Backed by Spach Optics Warranty & Support

    Ideal for labs using multiple microscope platforms

  • Fast, Reliable U.S. Shipping

    Most orders ship quickly from within the United States

  • Expert Support from Optical Specialists

    Guidance on compatibility, selection, and configuration