# Part name:
Carl Zeiss Jena PK 20x (8) microscope eyepieces with a mounting diameter of 23.2 mm (pair)

# Original page URL:
https://www.microscopeparts.eu/part/carl-zeiss-jena-pk-20x-8-microscope-eyepieces-with-a-mounting-diameter-of-23-2-mm-pair-99531

# 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:
Plan compensating microscope eyepieces manufactured by Carl Zeiss Jena with a high magnification of 20x.

Manufacturer: Carl Zeiss Jena
Model: PK 20x (8)
Magnification: 20x
Field of view: 8
Mounting diameter: 23.2 mm
Designation: PK = plan compensating - recommended for use with plan achromatic objectives, but they also work perfectly with achromatic and apochromatic objectives

Due to their very high quality, these eyepieces are often used together with microscopes from other manufacturers, especially when Carl Zeiss Jena Planachromat objectives are installed.

Important: these eyepieces can be used both with finite tube microscopes (e.g. 160 mm) and infinity-corrected microscopes. This means that they can be used, for example, both on a Carl Zeiss Jena Amplival microscope and on a Carl Zeiss Jena NU-2 microscope.

Note - in my opinion, eyepieces with such a high magnification are recommended rather for "inspection" than for continuous work. I deliberately write "I recommend" because this is my personal opinion based on practical use and not on the manufacturer's documentation.
An eyepiece magnification of 20x should rather be treated as a zoom without revealing additional details (the resolution is not increased). This is important, for example, in heads with built-in magnification (e.g. Carl Zeiss Jena heads with built-in magnification of 1.5x or 1.6x) - when working with a 100x oil immersion objective, we theoretically obtain 100*1.5*20 = 3000x, while physics does not allow the human eye to magnify visible light beyond approximately 1250x - therefore this is a so-called "empty magnification".

# Examples of use
- if you don't have these eyepieces in your set
- if you have 20x eyepieces, but they have a smaller field of view
- if you want to replace your poor-quality eyepieces
- if you have Planachromat objectives and want to use plan-compensated eyepieces

# Removed from microscope:
Carl Zeiss Jena model

# Also compatible with the following microscopes:
- Carl Zeiss Jena Lumipan
- Carl Zeiss Jena Nf
- Carl Zeiss Jena Eduval-4
- Carl Zeiss Jena Laboval-4
- Carl Zeiss Jena Amplival
- Carl Zeiss Jena Ergaval
- PZO Biolar
- Zeiss Standard 14
- Hertel & Reuss CN-fl
- Will Wetzlar V200
- Praktycznie każdy 160 Praktycznie każdy z TL = 160 mm

# Names, descriptions, terms, and search contexts under which this part is searched.
- Carl Zeiss Jena model microscope repair parts
- Carl Zeiss Jena 20x PK Mikroskop Okulare
- Mikroskop Brile für Carl Zeiss Jena Amplival und Ergaval Mikroskope
- Carl Zeiss Jena NU-2 Mikroskopuokulare
- Carl Zeiss Jena 20x PK microscope eyepieces
- Carl Zeiss Jena buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99531.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99531.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99531-carl-zeiss-jena-pk-20x-8-microscope-eyepieces-with-a-mounting-diameter-of-23-2-mm-pair
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99531.media.md
- Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-pk-20x-8-microscope-eyepieces-with-a-mounting-diameter-of-23-2-mm-pair-99531-2
- Representative video: https://www.microscopeparts.eu/play/99531-1
- 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