# Part name:
Carl Zeiss Jena Achromat 20x / 0,45 oo/0,17-A microscope objective with M25 thread Jenamed.

# Original page URL:
https://www.microscopeparts.eu/part/carl-zeiss-jena-jenalab-achromat-20x-0-45-oo-0-17-a-microscope-objective-with-m25-thread-jenamed-00522

# 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:
Objective

# Description and specifications:
Perfect exterior and optics. It's hard to find a lens in this condition on the used market.

Manufacturer: Carl Zeiss Jena
Magnification: 20x
Model: Achromat 20x / 0.45 oo/0.17-A
Color correction: Achromat
Numerical aperture: 0.45
Tube length: infinity
Focal length: not sure
Cover glass: 0.17 mm
Immersion: no
Thread: M25

This lens is often used with Leica microscopes (e.g., the DMLB, DMLS, or DM1000 models). It is often shorter than Leica objectives, but an extension adapter is used in these cases.

# Examples of use
- Jenamed or Jenalab microscopes often don't have a 20x objective lens installed.
- If you have one, but it's of very poor quality or damaged.
- If you're cautious and want to have one as a spare.

# Removed from microscope:
Carl Zeiss Jena Jenalab

# Also compatible with the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar

# Names, descriptions, terms, and search contexts under which this part is searched.
- Carl Zeiss Jena Jenalab microscope repair parts
- Leica DMLS
- Leica DMLB
- Leica DM1000
- Jenalab
- Jenamed
- Jenamed-2
- Jenaval
- Jenalumar
- microscope objective infinity
- Mikroskopobjektiv
- Mikroskop Objektiv unendlich
- Unendlichkeit
- objektyw
- nieskończoność
- nieskończony
- Carl Zeiss Jena buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/00522.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/00522.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/00522-carl-zeiss-jena-jenalab-achromat-20x-0-45-oo-0-17-a-microscope-objective-with-m25-thread-jenamed
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/00522.media.md
- Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-jenalab-achromat-20x-0-45-oo-0-17-a-microscope-objective-with-m25-thread-jenamed-00522-2
- Other parts from category Objective: https://www.microscopeparts.eu/objective
- More Objective removed from microscope Carl Zeiss Jena Jenalab: https://www.microscopeparts.eu/objective/from/carl-zeiss-jena/jenalab
- More Objective compatible with microscope Carl Zeiss Jena Jenalab: https://www.microscopeparts.eu/objective/for/carl-zeiss-jena/jenalab
- More Objective removed from microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/objective/from/carl-zeiss-jena
- More Objective compatible with microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/objective/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