# Part name: Carl Zeiss Jena Metalliput - 30x/0,40 Metallurgical microscope objective with EPI illuminator adapter (16 Epi, 30 Met) # Original page URL: https://www.microscopeparts.eu/part/carl-zeiss-jena-metalliput-30x-0-40-metallurgical-microscope-objective-with-epi-illuminator-adapter-16-epi-30-met-99156 # 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: VERY (!) rarely encountered on the used market special Epi / Met microscope objective made by Carl Zeiss Jena. Basic information: Product: microscope objective Manufacturer name: Epi-Objektiv 30x/0.40 Trockensystem Tubus unendlich, 1940 Name used before 1940: Epi-Objektiv 16/0.40 Trockensystem Tubus unendlich, 1937 Thread: due to measurement inaccuracy I provide: 11 mm or 11.5 mm Additional: the objective includes an insert that fits the EPI illuminator Magnification (so called magnifier magnification): 30x Numerical aperture: 0.40 Oil immersion: NO (dry objective) Focal length: 8,1 mm Compatibility: - Carl Zeiss Jena EPI reflected light condenser W - Carl Zeiss Jena EPI reflected light condenser WK - Carl Zeiss Jena Metalliput metallurgical microscope - Carl Zeiss Jena Met Mi IX metallurgical microscope This unusual objective has a narrow special thread, but with the use of an intermediate ring with correction lens it can also be used on a standard microscope stand (e.g. Carl Zeiss Jena Lg). When this objective is used on the Carl Zeiss Jena Metalliput microscope with an infinity corrected tube (in practice the tube length there is 250 mm), the full magnification of 30x is obtained. When this objective is used together with a reflected light condenser (with an additional intermediate lens in the tube, that is with a 160 mm tube length) the concave mirrors partially extend under the objective, therefore the free working distance cannot be fully utilized. In such a configuration the real magnification is about two times smaller, approximately 16x. Epi / Met objectives produced in the years 1937-1939 have two numbers engraved on the housing: 16 Epi, 30 Met. a) the smaller value applies when used with the EPI condenser (correction lens focal length = 160 mm) b) the larger value applies to the magnification obtained when the objective is used with the metallurgical microscope (correction lens focal length = 250 mm). In 1940 the method of marking magnification on the objective housing was changed and only the "magnifier magnification" and the numerical aperture value were provided. Information: the source of this information is the website of the Zeiss company archive. This information is provided in order to spread knowledge about rarely encountered microscope elements. # Examples of use - If you have a suitable microscope or EPI illuminator and this is exactly the objective you are missing - If you have such an objective but it is damaged or of very poor quality - If you have such an objective but the adapter for the EPI illuminator is missing - If you would like to have such a rare objective in your collection # Removed from microscope: Carl Zeiss Jena Metalliput # Also compatible with the following microscopes: - Carl Zeiss Jena Metalliput - Carl Zeiss Jena Epi Auflichtkondensor W - Carl Zeiss Jena Epi Auflichtkondensor WK - Carl Zeiss Jena Metallmikroskop Met Mi IX # Names, descriptions, terms, and search contexts under which this part is searched. - Carl Zeiss Jena Metalliput microscope repair parts - Carl Zeiss Jena Epi Auflichtkondensor W Objektivschlitten - Carl Zeiss Jena Epi Auflichtkondensor WK - Carl Zeiss Jena Metallmikroskop Met Mi IX - Carl Zeiss Jena Metallmikroskop Metalliput Objektiv - Carl Zeiss Jena buy spare parts # Related URLs: - Markdown po polsku: https://www.serwismikroskopowy.pl/part/99156.md - Markdown auf Deutsch: https://www.mikroskopteile.de/part/99156.md - Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99156-carl-zeiss-jena-metalliput-30x-0-40-metallurgical-microscope-objective-with-epi-illuminator-adapter-16-epi-30-met - Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99156.media.md - Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-metalliput-30x-0-40-metallurgical-microscope-objective-with-epi-illuminator-adapter-16-epi-30-met-99156-2 - Other parts from category Objective: https://www.microscopeparts.eu/objective - More Objective removed from microscope Carl Zeiss Jena Metalliput: https://www.microscopeparts.eu/objective/from/carl-zeiss-jena/metalliput - More Objective compatible with microscope Carl Zeiss Jena Metalliput: https://www.microscopeparts.eu/objective/for/carl-zeiss-jena/metalliput - 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