# Part name:
Carl Zeiss Jena Jenaval / Jenalumar microscope field diaphragm for transmitted light

# Original page URL:
https://www.microscopeparts.eu/part/carl-zeiss-jena-jenaval-jenalumar-microscope-field-diaphragm-for-transmitted-light-99690

# 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:
Iris diaphragms

# Description and specifications:
Transmitted-light field diaphragm (iris diaphragm) for Carl Zeiss Jena Jenaval, Jenalumar and similar microscopes.

Compatible with the following Carl Zeiss Jena microscope models:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- can also be installed in a Carl Zeiss Jena Jenavert microscope to add transmitted-light capability

This component is located inside the microscope base and enables the microscope illumination to be adjusted according to the Köhler illumination principle.

Interestingly, microscope versions intended exclusively for reflected-light operation (for example, the basic versions of the Carl Zeiss Jena Jenavert) do not include this transmitted-light field diaphragm because they do not have a transmitted-light optical path. However, the microscope base is identical to that used in transmitted-light models. This makes it possible to upgrade such an EPI microscope for transmitted-light operation by installing the complete lower transmitted-light optical path. The field diaphragm offered here is one of the components required for this conversion.

In the last photograph, an arrow indicates where the transmitted-light field diaphragm is located inside the microscope base, making this component easy to identify.

# Examples of use
- as a service element for whole-module replacement

# Removed from microscope:
Carl Zeiss Jena Jenaval

# Also compatible with the following microscopes:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert
- Carl Zeiss Jena Jenapol

# Names, descriptions, terms, and search contexts under which this part is searched.
- Carl Zeiss Jena Jenaval microscope repair parts
- Carl Zeiss Jena Jenaval / Jenalumar Mikroskop Durchlicht-Leuchtfeldblende
- Carl Zeiss Jena Jenapol microscope fiels diaphragm
- Carl Zeiss Jena Jenavert Mikroskop Durchlicht-Leuchtfeldblende
- Jenaval Irisblende
- Carl Zeiss Jena buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99690.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99690.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99690-carl-zeiss-jena-jenaval-jenalumar-microscope-field-diaphragm-for-transmitted-light
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99690.media.md
- Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-jenaval-jenalumar-microscope-field-diaphragm-for-transmitted-light-99690-2
- Representative video: https://www.microscopeparts.eu/play/99690-1
- Other parts from category Iris diaphragms: https://www.microscopeparts.eu/iris-diaphragms
- More Iris diaphragms removed from microscope Carl Zeiss Jena Jenaval: https://www.microscopeparts.eu/iris-diaphragms/from/carl-zeiss-jena/jenaval
- More Iris diaphragms compatible with microscope Carl Zeiss Jena Jenaval: https://www.microscopeparts.eu/iris-diaphragms/for/carl-zeiss-jena/jenaval
- More Iris diaphragms removed from microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/iris-diaphragms/from/carl-zeiss-jena
- More Iris diaphragms compatible with microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/iris-diaphragms/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: 2026-08-05