# Part name:
Carl Zeiss Jena Jenamed / Jenaval microscope lighting brightness adjustment knob

# Original page URL:
https://www.microscopeparts.eu/part/carl-zeiss-jena-jenamed-jenaval-microscope-lighting-brightness-adjustment-knob-99458

# 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:
Service and spare parts

# Description and specifications:
Light intensity adjustment knob for Carl Zeiss Jena CF-250 group microscopes.

Compatible with the following Carl Zeiss Jena microscopes:
- Jenamed (models Variant, Cytology, Hematology, Histology, Jenamed-2, Fluorescence)
- Jenapol
- Jenavert
- Jenaval
- Jenatech
- Jenalumar

Please note - this is only the adjustment knob, that is the knob used by the microscope user to make the illumination brighter or dimmer. It is not a potentiometer and therefore not a part of the electrical circuit.

This knob features the characteristic white cap used on Carl Zeiss Jena microscopes, which is often lost during decades of microscope use.

Mechanically, this knob is attached to the potentiometer. The fixing screw is covered by a white metal cap.

In the last photo I indicate with an arrow exactly which element it is and where it is located in a Carl Zeiss Jena Jenamed microscope. In Jenaval and Jenalumar microscopes it is located on the microscope base.

# Examples of use
- as a service element in the form of replacing the complete assembly if exactly this element or one of its component parts is damaged in the repaired microscope

# Removed from microscope:
Carl Zeiss Jena Jenamed

# Also compatible with the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Stereomikroskop Stativ XII
- Carl Zeiss Jena Jenavert
- Carl Zeiss Jena Jenapol

# Names, descriptions, terms, and search contexts under which this part is searched.
- Carl Zeiss Jena Jenamed microscope repair parts
- Carl Zeiss Jena Jenamed and Jenaval microscope light intensity adjustment knob
- Carl Zeiss Jena Jenavert and Jenalumar illumination brightness control-knob
- Carl Zeiss Jena Jenaval und Jenalumar Mikroskop Drehknopf zur Regelung der Beleuchtungsintensität
- Carl Zeiss Jena Jenatech und Jenamed Mikroskop Lampen-Verstellungs-Knopf
- Carl Zeiss Jena buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99458.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99458.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99458-carl-zeiss-jena-jenamed-jenaval-microscope-lighting-brightness-adjustment-knob
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99458.media.md
- Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-jenamed-jenaval-microscope-lighting-brightness-adjustment-knob-99458-2
- Representative video: https://www.microscopeparts.eu/play/99458-1
- Other parts from category Service and spare parts: https://www.microscopeparts.eu/service-and-spare-parts
- More Service and spare parts removed from microscope Carl Zeiss Jena Jenamed: https://www.microscopeparts.eu/service-and-spare-parts/from/carl-zeiss-jena/jenamed
- More Service and spare parts compatible with microscope Carl Zeiss Jena Jenamed: https://www.microscopeparts.eu/service-and-spare-parts/for/carl-zeiss-jena/jenamed
- More Service and spare parts removed from microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/service-and-spare-parts/from/carl-zeiss-jena
- More Service and spare parts compatible with microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/service-and-spare-parts/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