# Part name:
Auxiliary microscope "P" Carl Zeiss Jena for adjusting the phase rings, dark field diaphragm and DIC in the condenser (23.2 mm microscope eyepiece, telescope)

# Original page URL:
https://www.microscopeparts.eu/part/carl-zeiss-jena-auxiliary-microscope-p-carl-zeiss-jena-for-adjusting-the-phase-rings-dark-field-diaphragm-00565

# Part manufacturer:
Carl Zeiss Jena

# Full manufacturer name:
VEB Carl Zeiss Jena DDR (former East Germany)

# Other names of this manufacturer:
- ausJena
- aus Jena
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:
Eyepieces

# Description and specifications:
This device replaces one of the eyepieces on the microscope head and is used to center the phase contrast, dark field, or DIC discs in the slides or condenser. Common names include:
- auxiliary microscope
- telescope
- phase eyepiece

It is also often used to test the quality of microscope objectives, look for contamination, delamination, diaphragm condition, or adjust the Koehler illumination (observing the filament in a light bulb). It can be used with any microscope manufacturer as long as it uses eyepieces with a mounting diameter of 23.2 mm.

Manufacturer: Carl Zeiss Jena
Model: P
Mounting diameter: 23.2 mm

# Examples of use
- for setting phase contrast, DIC, and dark field
- for testing lenses for dirt or damage
- for setting Koehler standard illumination

# Removed from microscope:
Carl Zeiss Jena model

# Also compatible with the following microscopes:
- Praktycznie każdy TL=finite Praktycznie każdy z TL = finite

- Praktycznie każdy 160 Praktycznie każdy z TL = 160 mm
- Praktycznie każdy 170 Praktycznie każdy z TL = 170 mm
- Carl Zeiss Jena model
- Optic and

# Names, descriptions, terms, and search contexts under which this part is searched.
- Carl Zeiss Jena model microscope repair parts
- auxiliary microscope
- telescope
- phase eyepiece
- Hilfsmikroskop
- Teleskop
- Phasenokular
- mikroskop pomocniczy
- okular fazowy
- phase contrast
- kontrast fazowy
- phasenkontrast
- dic
- dik
- ciemne pole
- darkfield
- dunkelfeld
- objektiv
- objective
- obiektyw
- okular
- eyepiece
- Koehler light
- illumination
- beleuchtung
- Carl Zeiss Jena buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/00565.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/00565.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/00565-carl-zeiss-jena-auxiliary-microscope-p-carl-zeiss-jena-for-adjusting-the-phase-rings-dark-field-diaphragm
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/00565.media.md
- Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-auxiliary-microscope-p-carl-zeiss-jena-for-adjusting-the-phase-rings-dark-field-diaphragm-00565-2
- Other parts from category Eyepieces: https://www.microscopeparts.eu/eyepieces
- More Eyepieces removed from microscope Carl Zeiss Jena model: https://www.microscopeparts.eu/eyepieces/from/carl-zeiss-jena/model
- More Eyepieces compatible with microscope Carl Zeiss Jena model: https://www.microscopeparts.eu/eyepieces/for/carl-zeiss-jena/model
- More Eyepieces removed from microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/eyepieces/from/carl-zeiss-jena
- More Eyepieces compatible with microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/eyepieces/for/carl-zeiss-jena

# 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: 2026-06-30