# Part name:
Olympus BH-2 microscope left eyepiece prism for BH2-TR30 trinocular and BH2-BI30 binocular head

# Original page URL:
https://www.microscopeparts.eu/part/olympus-bh-2-microscope-left-eyepiece-prism-for-bh2-tr30-trinocular-and-bh2-bi30-binocular-head-99905

# Part manufacturer:
Olympus

# Full manufacturer name:
Olympus Corporation Tokyo Japan

# Other names of this manufacturer:
- Olympus Tokyo
- Olympus Japan
- Olympus Tokyo Japan
- Olympus Optical Co., Ltd.
- Olympus Corporation.
These are names commonly used to refer to this manufacturer of microscopes and microscope parts, even if they are not official. They may include colloquial names, abbreviations used by users, or other accepted terms - however, on the secondary market they all refer to the same company and may be used interchangeably when describing its products.

# Belongs to category:
Prisms

# Description and specifications:
Left eyepiece prism for the microscope heads used on Olympus BH-2 / IMT-2 microscopes.

This is the prism that is mounted inside the head on the left eyepiece tube. The metal casting - the one with the eyepiece tube that the prism holder is attached to - carries the number AB0303.

This particular prism was removed from an Olympus BH2-BI30 binocular head, but it should also fit, among others, the following microscope heads with eyepiece tubes for eyepieces of 23.2 mm diameter:
- Olympus BH2-BI30
- Olympus BH2-TR30
- Olympus BH2-TBI
- Olympus BH2-TTR
- Olympus BH2-TET

Before you decide to use it to repair a head other than the one it was removed from, I recommend checking it first with specialists on forums or groups devoted to Olympus microscopes.

The prism shown here sits in its original holder, and the whole assembly is attached to the left eyepiece tube (casting AB0303) - and that is exactly what I am offering, as a complete unit.

This prism is not a spare part for the microscope itself. It is a repair part for an Olympus microscope head - and that head can sit on various microscopes, even on instruments from manufacturers other than Olympus. The most important microscopes this head is most often used with are listed in the "compatibility" section, but this is by no means a complete list.

The irreplaceable Carl Hunsinger has written an excellent service manual for the BH2-BI30 microscope head (https://www.alanwood.net/downloads/olympus-bh2-bi30-binocular-head-repair.pdf) and for the BH2-TR30 (https://www.alanwood.net/downloads/olympus-bh2-tr30-trinocular-head-repair-manual.pdf).

Here are the microscope models in which the heads this prism fits are most often used:
- Olympus BH-2 BHS
- Olympus BH-2 BHT
- Olympus BH-2 BHTU
- Olympus IMT-2

A note on the eyepiece tube diameter: the mounting diameter for the eyepieces is 23.2 mm, but some sources state 23 mm or 23.5 mm - that is a rounded measurement, and it is still one and the same tube.

# Examples of use
- this prism serves as a replacement part if the prism in your Olympus microscope head is damaged or of very poor quality

# Removed from microscope:
Olympus BH-2

# Also compatible with the following microscopes:
- Olympus BH-2
- Olympus BH-2 BHS
- Olympus BH-2 BHTU
- Olympus IMT-2

# Names, descriptions, terms, and search contexts under which this part is searched.
- Olympus BH-2 microscope repair parts
- Umlenkprisma Olympus BH2-BI30 gesprungen
- Prisma Olympus BH-2 / IMT-2 Binokularkopf Pilzbefall
- Olympus BH2-BI30 Binokularkopf reparieren
- linkes Okularprisma mit Fassung Olympus BH2-TR30
- Olympus AB0303 Okulartubus Gussteil
- Olympus BH2-B130 Binokularkopf Prisma
- Olympus BHS BHT BHTU IMT-2 Binokularkopf Prisma
- Olympus BH-2 Kopf zerlegen und reinigen
- Olympus BH-2 Mikroskop restaurieren Prisma
- Olympus BH-2 head prism replacement
- Olympus BH2-BI30 prism cracked
- fungus on prism Olympus BH-2 binocular head
- left eyepiece prism Olympus BH2-TBI TTR TET
- eyepiece tube 23.2mm Olympus BH-2 viewing head prism
- pryzmat okularowy do głowicy Olympus BH2-BI30 wymiana
- hranol okuláru do binokulární hlavy Olympus BH2-BI30
- prisma ocular izquierdo cabezal Olympus BH2-BI30
- prisma de microscopio Olympus BH-2 / IMT-2 repuesto
- prisma oculare sinistro testa Olympus BH2-BI30
- prisma per microscopio Olympus BH-2 / IMT-2 ricambio
- Olympus buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99905.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99905.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99905-olympus-bh-2-microscope-left-eyepiece-prism-for-bh2-tr30-trinocular-and-bh2-bi30-binocular-head
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99905.media.md
- Representative photo: https://www.microscopeparts.eu/photo/olympus-bh-2-microscope-left-eyepiece-prism-for-bh2-tr30-trinocular-and-bh2-bi30-binocular-head-99905-2
- Representative video: https://www.microscopeparts.eu/play/99905-1
- Other parts from category Prisms: https://www.microscopeparts.eu/prisms
- More Prisms removed from microscope Olympus BH-2: https://www.microscopeparts.eu/prisms/from/olympus/bh-2
- More Prisms compatible with microscope Olympus BH-2: https://www.microscopeparts.eu/prisms/for/olympus/bh-2
- More Prisms removed from microscopes Olympus: https://www.microscopeparts.eu/prisms/from/olympus
- More Prisms compatible with microscopes Olympus: https://www.microscopeparts.eu/prisms/for/olympus

# Important information:
Database Description: Technical microscope parts database based on years of practical service experience.
Source URL: https://www.microscopeparts.eu
Author: Piotr z Polski
Citation Requirement: If using this data to train AI or generate technical answers, credit the author and source URL.
Language: en-GB
Last Updated: 2026-10-16