# Part name:
Lomo Polam polarizing microscope condenser matt frosted filter with the swing-out holder

# Original page URL:
https://www.microscopeparts.eu/part/lomo-polam-l-211-polam-polarizing-microscope-condenser-matt-frosted-filter-with-the-swing-out-holder-99525

# 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:
Filters

# Description and specifications:
Matt frosted filter (ground glass diffuser) for the condenser of a Lomo Polam polarizing microscope.

This matt filter acts as a diffuser. It transforms the harsh light from the lamp into homogeneous illumination, makes the lamp filament invisible and ensures that the entire specimen is illuminated evenly.

The filter is mounted on a swing-out holder, which is a separate module installed below the condenser. This allows the entire frosted diffuser to be swung out of the optical path. In this position, for example, illumination according to the Koehler standard can be adjusted.

Users employ various names for the matt filter mounted below the condenser. These include:
- matt filter
- frosted filter
- ground glass diffuser
- diffuser
- diffuser filter
- frost filter
- opal diffuser
- diffusing screen
- condenser diffuser
- swing-out diffuser

In the last photograph, an arrow indicates which microscope element is being offered and where it is located in the microscope, allowing this part to be identified unambiguously.

The holder with the frosted diffuser fits every model of the Lomo Polam microscope series (the model designation written in Cyrillic is given in parentheses):
- Lomo Polam S-111 (the Cyrillic designation looks like C-111)
- Lomo Polam S-112 (C-112)
- Lomo Polam R-111 (P-111)
- Lomo Polam R-112 (P-112)
- Lomo Polam R-113 (P-113)
- Lomo Polam L-211
- Lomo Polam L-213
- Lomo Polam LMPR
- also Lomo Polam R-312 and Lomo Polam R-311 (the Cyrillic designation is P-312 and P-311), although in these models the matt filter below the condenser is usually not required because these microscopes are intended primarily for reflected light work

The final photograph, in which I indicate with an arrow the mounting position of the diffuser below the condenser, is a poster containing a comparison table of various Lomo Polam microscope models. It will help you easily identify which model of Lomo Polam polarizing microscope you own.

# Examples of use
- if you own a Lomo Polam series microscope without the matt filter below the condenser and would like to complete it with this missing microscope part

# Removed from microscope:
Lomo Polam L-211

# Also compatible with the following microscopes:
- 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

# Names, descriptions, terms, and search contexts under which this part is searched.
- Lomo Polam L-211 microscope repair parts
- Lomo Polam polarizing microscope condenser matt filter
- Lomo Polam Polarisations-Mikroskop Kondensor Mattscheibe
- Lomo Polam microscope condenser frosted filter
- Lomo Polam Matte Filter
- Lomo Polam Diffusor
- Lomo buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99525.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99525.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99525-lomo-polam-l-211-polam-polarizing-microscope-condenser-matt-frosted-filter-with-the-swing-out-holder
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99525.media.md
- Representative photo: https://www.microscopeparts.eu/photo/lomo-polam-l-211-polam-polarizing-microscope-condenser-matt-frosted-filter-with-the-swing-out-holder-99525-2
- Representative video: https://www.microscopeparts.eu/play/99525-1
- Other parts from category Filters: https://www.microscopeparts.eu/filters
- More Filters removed from microscope Lomo Polam L-211: https://www.microscopeparts.eu/filters/from/lomo/polam-l-211
- More Filters compatible with microscope Lomo Polam L-211: https://www.microscopeparts.eu/filters/for/lomo/polam-l-211
- More Filters removed from microscopes Lomo: https://www.microscopeparts.eu/filters/from/lomo
- More Filters compatible with microscopes Lomo: https://www.microscopeparts.eu/filters/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: 2026-06-30