# Part name:
Zeiss (West Germany) microscope clear glass ring insert (blank for DIY annuli) | phase condenser diaphragm carrier, complete insert, clear glass

# Original page URL:
https://www.microscopeparts.eu/part/zeiss-photomicroscope-iii-rs-west-germany-microscope-clear-glass-ring-insert-blank-for-diy-annuli-phase-condenser-99639

# 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:
Service and spare parts

# Description and specifications:
Complete clear glass ring insert with retaining ring – without a printed diaphragm (the original coating has been removed) – for Carl Zeiss (West Germany) phase contrast condensers.

Basic parameters of this clear glass insert:
Manufacturer: Carl Zeiss (Oberkochen, West Germany)
Material: glass mounted in a metal retaining ring with flange
Outside diameter of the retaining ring: 22 mm
Diameter of the clear glass disc: 16 mm
Height of the retaining ring: 3.5 mm

Below are some example applications for this clear glass blank. It can be printed or fitted with, among others:
- a phase annulus or darkfield annulus matching the original one that was installed in the condenser but has become damaged
- an annulus missing from the condenser
- coloured Rheinberg rings
- oblique illumination diaphragms producing a DIC-like effect
- a Hoffmann modulation contrast pattern
- phase annuli for objectives made by other manufacturers, for example Carl Zeiss Jena PhV
- any completely custom DIY design

This particular clear glass ring insert was removed from a fluorescence phase contrast condenser — an older version of the Zeiss condenser P/N 46 52 78. Before installing it in your condenser, carefully compare the shape of its housing and the dimensions of the retaining ring.

Interchangeable diaphragm carriers (whether for phase contrast or, for example, darkfield) make it possible to configure a phase contrast condenser exactly as required. This allows the condenser to support precisely the observation techniques and microscope objectives needed.

The clear glass blank presented here is not a component intended for any specific microscope model. Instead, it is used to upgrade or repair a microscope phase contrast condenser. Likewise, it is not dedicated to any specific condenser model. Many Carl Zeiss condenser models have a suitable opening into which this complete insert can be fitted and customised with your own pattern.

The last photograph in the gallery shows the turret disc of a Zeiss phase contrast condenser. An arrow indicates the clear glass ring insert offered here, already installed.

# Examples of use
- example applications are listed in the description

# Removed from microscope:
Zeiss Photomicroscope III RS

# Also compatible with the following microscopes:
- Zeiss Photomicroscope II
- Zeiss Photomicroscope III RS
- Zeiss Standard 14
- Zeiss Standard GFL
- Zeiss Standard WL
- Zeiss Standard 16
- Zeiss Universal
- Zeiss Photomicroscope
- Zeiss Ultraphot
- Zeiss Standard 20
- Zeiss Standard 25

# Names, descriptions, terms, and search contexts under which this part is searched.
- Zeiss Photomicroscope III RS microscope repair parts
- Carl Zeiss Mikroskop Phasenkontrast Kondensor Ring-Blende
- Carl Zeiss microscope phase contrast condenser diaphragm ring
- Zeiss (West Germany) Mikroskop Phasenring / Dunkelfeld
- Carl Zeiss Phasenkontrast-Kondensor Ringblende
- Zeiss (West Germany) microscope phase annulus insert
- Zeiss buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99639.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99639.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99639-zeiss-photomicroscope-iii-rs-west-germany-microscope-clear-glass-ring-insert-blank-for-diy-annuli-phase-condenser
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99639.media.md
- Representative photo: https://www.microscopeparts.eu/photo/zeiss-photomicroscope-iii-rs-west-germany-microscope-clear-glass-ring-insert-blank-for-diy-annuli-phase-condenser-99639-2
- Other parts from category Service and spare parts: https://www.microscopeparts.eu/service-and-spare-parts
- More Service and spare parts removed from microscope Zeiss Photomicroscope III RS: https://www.microscopeparts.eu/service-and-spare-parts/from/zeiss/photomicroscope-iii-rs
- More Service and spare parts compatible with microscope Zeiss Photomicroscope III RS: https://www.microscopeparts.eu/service-and-spare-parts/for/zeiss/photomicroscope-iii-rs
- More Service and spare parts removed from microscopes Zeiss: https://www.microscopeparts.eu/service-and-spare-parts/from/zeiss
- More Service and spare parts compatible with microscopes Zeiss: https://www.microscopeparts.eu/service-and-spare-parts/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: 2026-07-26