# Part name:
Zeiss Photomicroscope / Universal microscope EPI fluorescence illuminator cap cover plug

# Original page URL:
https://www.microscopeparts.eu/part/zeiss-photomicroscope-universal-microscope-epi-fluorescence-illuminator-cap-cover-plug-99579

# Part manufacturer:
Zeiss

# Full manufacturer name:
Carl Zeiss West Germany

# Other names of this manufacturer:
- Carl Zeiss West
- Carl Zeiss West Germany
- Opton
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:
End caps

# Description and specifications:
Cap cover for the EPI reflected-light illuminator—most commonly a fluorescence illuminator—for Zeiss Universal and Photomicroscope (Phomi) microscopes.

This is a round plastic cap with a metal insert, designed to cover the output port of the EPI illuminator. It is removed when an EPI fluorescence illuminator turret is installed (for example, on the Zeiss Photomicroscope III RS).

Please note that some versions of the Zeiss Universal microscope do not have an EPI reflected-light illuminator port.

The accompanying video, using a Zeiss Photomicroscope II as an example, shows exactly where this cap is located on the microscope and how it is installed and removed.

On the secondary market, many Zeiss Phomi (Photomicroscope) and Zeiss Universal microscopes are missing this cap. As a result, dust can enter the illumination system (in other words, the light path). Why is this cap often missing?
- first, it can be removed very easily, so over the years it may simply get lost
- secondly, the microscope body and the EPI fluorescence illuminator turret are often sold separately, so after the turret has been removed, the EPI illuminator port remains uncovered

# Examples of use
- if you have a microscope with EPI illumination but are missing the original cap

# Removed from microscope:
Zeiss Photomicroscope

# Also compatible with the following microscopes:
- Zeiss Photomicroscope
- Zeiss Universal
- Zeiss Photomicroscope II
- Zeiss Photomicroscope III RS

# Names, descriptions, terms, and search contexts under which this part is searched.
- Zeiss Photomicroscope microscope repair parts
- Zeiss Universal / Phomi microscope EPI fluorescence cap
- Zeiss Photomicroscope microscope EPI light plug
- Zeiss Universal / Photomicroscope Mikroskop Auflicht Fluoreszenz Endkappe
- Zeiss Standard Phomi Mikroskop EPI Beleuchtung Endkappe
- Zeiss buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99579.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99579.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99579-zeiss-photomicroscope-universal-microscope-epi-fluorescence-illuminator-cap-cover-plug
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99579.media.md
- Representative photo: https://www.microscopeparts.eu/photo/zeiss-photomicroscope-universal-microscope-epi-fluorescence-illuminator-cap-cover-plug-99579-2
- Representative video: https://www.microscopeparts.eu/play/99579-1
- Other parts from category End caps: https://www.microscopeparts.eu/end-caps
- More End caps removed from microscope Zeiss Photomicroscope: https://www.microscopeparts.eu/end-caps/from/zeiss/photomicroscope
- More End caps compatible with microscope Zeiss Photomicroscope: https://www.microscopeparts.eu/end-caps/for/zeiss/photomicroscope
- More End caps removed from microscopes Zeiss: https://www.microscopeparts.eu/end-caps/from/zeiss
- More End caps compatible with microscopes Zeiss: https://www.microscopeparts.eu/end-caps/for/zeiss

# 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: 2026-07-22