# Part name:
Lomo Polam L-213 / R-113 PLAN 25x0,50 P polarizing microscope objective with Pol iris diaphragm

# Original page URL:
https://www.microscopeparts.eu/part/lomo-polam-l-213-r-113-plan-25x0-50-p-polarizing-microscope-objective-with-pol-iris-diaphragm-99563

# Part manufacturer:
Lomo

# Full manufacturer name:
Leningrad Optical Mechanical Association

# Other names of this manufacturer:
- LZOS
- TOMP
- WTOMP
- WOOMP
- GOMZ
- LOOMP
- Progres
- Progress
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:
PLAN achromatic polarizing microscope objective Lomo PLAN 25x0.50 P with iris diaphragm for Lomo Polam series polarizing microscopes.

Basic parameters:
Manufacturer: Lomo
Model: PLAN 25x0.50 P
Original designation: ЛОМО ПЛАН 25х0,50 П
Magnification: 25x
Numerical aperture N.A.: 0.50
Tube length: 160 mm
Cover glass: yes, 0.17 mm thickness
Immersion oil: no – this is a dry objective
Focal length: 45 mm
Thread type: RMS
Additional designation: P (Cyrillic: П) indicates that this objective is designed for use with polarized light
Special features: built-in iris diaphragm
Year of manufacture: 1976

This objective has a standard RMS thread and TL=160 mm, which means it can be used with the vast majority of microscopes from virtually any manufacturer, including Olympus, Zeiss, Nikon, PZO, Carl Zeiss Jena, Reichert, Wild and many others.

The built-in iris diaphragm allows, among other things, precise centering of the objective, because in a polarizing microscope the following diaphragms may operate simultaneously:
- field diaphragm in the illuminator
- aperture diaphragm (or two aperture diaphragms) in the condenser
- iris diaphragm in the microscope objective
- iris diaphragm in the eyepiece head
and accurate centering of all of them relative to each other is very important in polarized-light observations.

Objectives marked "P" / "Pol" feature a special construction in which the lenses are mounted and cemented in a way that prevents mechanical stress. They can be used both for conventional brightfield microscopy and for observations in polarized light.

# Examples of use
- If you have a microscope from any manufacturer and this is the objective you are missing

# Removed from microscope:
Lomo Polam L-213

# Also compatible with the following microscopes:
- Lomo Polam
- Lomo Polam R-113
- Lomo Polam L-211
- Lomo Polam LMPR
- Lomo Polam R-311
- Lomo Polam L-213
- Lomo Polam S-111
- Lomo Polam S-112
- Lomo Polam R-111
- Lomo Polam R-112
- Leitz HM-LUX 3
- Leitz Laborlux S
- Leitz Laborlux 11 Pol S
- Leitz SM-LUX
- Leitz Ortholux II
- Leitz Orthoplan
- Leitz Diaplan
- Zeiss Universal
- Zeiss Standard WL
- Carl Zeiss Jena Nf
- Carl Zeiss Jena Ng
- Carl Zeiss Jena NU
- Carl Zeiss Jena NU-2
- Carl Zeiss Jena Eduval
- Carl Zeiss Jena Eduval-4
- Carl Zeiss Jena Laboval
- Carl Zeiss Jena Laboval-2
- Carl Zeiss Jena Laboval-3
- Carl Zeiss Jena Laboval-4
- Carl Zeiss Jena Laboval Pol
- Carl Zeiss Jena Laboval Fluorescence
- Carl Zeiss Jena Fluoval-2
- Olympus BH-2 BHS
- Olympus CK2
- Olympus BHA
- Olympus CH-2 CHT
- Olympus BH-2 BHTU
- PZO Biolar DIC
- PZO Biolar
- PZO Studar
- PZO MB-30
- PZO MS4
- PZO ML4
- PZO ML5
- PZO ML6
- PZO MS6
- PZO Biolar FL
- PZO MB 30S
- Vickers Patholette
- Lomo MICMED-2
- Lomo MIN-8
- Lomo MBB-1
- Lomo Biolam
- Lomo Biolam D11
- Lomo MBP-1
- Lomo Erudit
- Lomo Biolam 70
- Zeiss Standard 14
- Zeiss Standard GFL
- Zeiss Standard WL
- Zeiss Standard 16
- Zeiss Photomicroscope
- Zeiss KF 2
- Zeiss Ultraphot
- Meopta DRU-3
- Meopta RU2
- IOR Biorom
- IOR ML-4M
- IOR MC-7
- Hertel & Reuss Studio C
- Hertel & Reuss CN-fl
- Hertel & Reuss Primus
- Hertel & Reuss Superpan
- Hertel & Reuss Labopan
- Hertel & Reuss Metall
- Hertel & Reuss Studio II
- Will Wetzlar V200
- Will Wetzlar V100
- Will Wetzlar V300
- Reichert Neozet
- Reichert Zetopan
- Reichert Biopan
- Reichert Neopan
- Eschenbach Kolleg SH45
- SWIFT (Japan) M2240
- SWIFT (Japan) Collegiate 400
- SWIFT (Japan) M4000-D
- Watson Microsystem 70
- Vickers M72
- Vickers M70
- Vickers Patholux
- Vickers Patholette
- Zeiss Photomicroscope II
- Zeiss Photomicroscope III RS

# Names, descriptions, terms, and search contexts under which this part is searched.
- Lomo Polam L-213 microscope repair parts
- Lomo Polam POL-Mikroskop Objektiv
- Lomo Polam Mikroskopobjektiv mit Irisblende
- Lomo Polam Mikroskop 25x RMS Objektiv
- Lomo Polam microscope objective
- Lomo Polam polarizing microscope objective
- Lomo objective with iris diaphragm
- Lomo buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99563.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99563.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99563-lomo-polam-l-213-r-113-plan-25x0-50-p-polarizing-microscope-objective-with-pol-iris-diaphragm
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99563.media.md
- Representative photo: https://www.microscopeparts.eu/photo/lomo-polam-l-213-r-113-plan-25x0-50-p-polarizing-microscope-objective-with-pol-iris-diaphragm-99563-2
- Representative video: https://www.microscopeparts.eu/play/99563-1
- Other parts from category Objective: https://www.microscopeparts.eu/objective
- More Objective removed from microscope Lomo Polam L-213: https://www.microscopeparts.eu/objective/from/lomo/polam-l-213
- More Objective compatible with microscope Lomo Polam L-213: https://www.microscopeparts.eu/objective/for/lomo/polam-l-213
- More Objective removed from microscopes Lomo: https://www.microscopeparts.eu/objective/from/lomo
- More Objective compatible with microscopes Lomo: https://www.microscopeparts.eu/objective/for/lomo

# 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: 2026-07-12