# Part name:
Carl Zeiss Jena Jenaval / Jenalumar microscope second collector lens from microscope base

# Original page URL:
https://www.microscopeparts.eu/part/carl-zeiss-jena-jenaval-jenalumar-microscope-second-collector-lens-from-microscope-base-99686

# 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:
Lenses

# Description and specifications:
Second collector lens of the Koehler transmitted-light illumination for the base of Carl Zeiss Jena Jenaval / Jenalumar microscopes.

The base of Carl Zeiss Jena Jenaval and Jenalumar microscopes (and of Carl Zeiss Jena Jenavert microscopes, if they are equipped for transmitted light) holds a set of lenses that collimate the light beam. Together they form the Koehler illumination collector, even though they are not mechanically connected to each other.

Here I present a module consisting of:
- the second collector lens in the sequence
- the metal mount holding the lens
- the screws for fastening the mount with the lens to the microscope base

The last photos in the gallery show the complete base of a Carl Zeiss Jena Jenaval microscope. An arrow indicates which part this is and exactly where it sits, so the part can be identified unambiguously.

This lens in its mount fits the bases of the following microscope models:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert

Note - Carl Zeiss Jena Jenavert microscopes come in two versions: reflected light (EPI) only, and reflected (EPI) plus transmitted light. The lens presented here fits both versions, but in the version without transmitted light... it simply has nothing to do :)

This is a service part for anyone who needs to replace this particular part in their microscope. It is not a complete illumination collector.

# Examples of use
- as a service part if you have a microscope in which this element is damaged, incomplete or perhaps even missing
- if you need a collimator lens for your own DIY project

# 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

# Names, descriptions, terms, and search contexts under which this part is searched.
- Carl Zeiss Jena Jenaval microscope repair parts
- CZJ Jenaval Köhler second collector lens replacement
- Carl Zeiss Jena Jenalumar Kollektorlinse im Stativfuß
- Zeiss Jena Jenaval collector lens fungus in microscope base
- Zeiss Jena Jenavert Durchlicht Kollektorlinse mit Fassung
- CZJ Jenalumar Kollektorlinse Pilzbefall - Beleuchtung im Fuß
- aus JENA Jenaval zweite Kollektorlinse gebrochen ersetzen
- Zeiss Jena Jenavert transmitted light collector lens cracked
- pęknięta soczewka kolektora z podstawy mikroskopu Carl Zeiss Jena Jenaval
- Carl Zeiss Jena buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99686.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99686.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99686-carl-zeiss-jena-jenaval-jenalumar-microscope-second-collector-lens-from-microscope-base
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99686.media.md
- Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-jenaval-jenalumar-microscope-second-collector-lens-from-microscope-base-99686-2
- Representative video: https://www.microscopeparts.eu/play/99686-1
- Other parts from category Lenses: https://www.microscopeparts.eu/lenses
- More Lenses removed from microscope Carl Zeiss Jena Jenaval: https://www.microscopeparts.eu/lenses/from/carl-zeiss-jena/jenaval
- More Lenses compatible with microscope Carl Zeiss Jena Jenaval: https://www.microscopeparts.eu/lenses/for/carl-zeiss-jena/jenaval
- More Lenses removed from microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/lenses/from/carl-zeiss-jena
- More Lenses compatible with microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/lenses/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: 2026-09-22