# Part name:
Lomo Biolam light baffle for microscope monocular head | Bresser Biolam and Erudit compatible

# Original page URL:
https://www.microscopeparts.eu/part/lomo-biolam-light-baffle-for-microscope-monocular-head-bresser-biolam-and-erudit-compatible-99980

# 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:
Service and spare parts

# Description and specifications:
Plastic light baffle for the microscope monocular head of the LOMO Biolam microscopes and similar models.

On microscopes of the LOMO Biolam class the monocular head sits on the microscope body on a round aluminium dovetail (). The inner opening of this mount measures about 35 mm, while the angle prism inside the head () is only 17 mm wide (about 15 mm in effective width). To prevent artefacts such as reflections (flares) or a milky image, LOMO fitted a dedicated stop into the dovetail of the head, limiting the amount of light and shaping the beam that enters the head. This is the very part offered here.

Key data of this baffle:
Function: limiting the amount of light that reaches the prism inside the monocular head
Material: plastic
Colour: black
Outer diameter: 37 mm
Diameter of the inner opening: 13,5 mm
Fitting: pushed in from below into the mount of the monocular head - the part is press-fitted, not screwed in

Very important: this glare stop is made of very thin plastic. Over the years the material turns very (!) brittle - and that is why heads without this light stop turn up so often. For the same reason, unfortunately, you have to fit the insert into the head with great care, so that the plastic does not break during assembly.

With this black baffle missing, artefacts can appear that are visible to the naked eye or when taking photomicrographs with a camera or a mobile phone.

If the baffle is missing from the monocular tube of a Lomo Biolam microscope, putting one back in can help with the following problems:
- when the image is too milky, slightly soft and low in contrast. This may be caused by exactly that: too wide a beam reaching the prism. Note: the cause may also be eyepieces with too high a magnification
- when flares, reflections or overly bright areas show up in the image, especially in its centre. The cause may be light bouncing off the bare aluminium mount (the dovetail). The black glare stop covers precisely a part of that metal element.

Note: the newest microscopes of this class, especially those built after 1990 (later examples of the Lomo Micmed-1 as well as Bresser Biolam and Lomo Biolam with illumination built into the base), have a monocular head with an angular inclined tube. All older microscopes of this class have a head with a hemispherical inclined tube. The plastic glare stop offered here fits this ROUND version of the head (see the last photo in the gallery). The newer, angular heads do not have it.

So that you can tell exactly which version of the monocular head this black insert fits, the last two photos in the gallery show:
- the complete monocular head, with an arrow showing where the baffle sits inside it
- a close-up of the dovetail itself with the light stop in place

Monocular heads of this kind, the ones LOMO originally fitted these light baffles into, can be found in the following microscopes, among others:
- Lomo Erudit (ЛОМО Эрудит)
- Lomo Biolam 70
- Lomo Micmed-1
- Lomo Biolam Д1 / Д2 / Д3 / Д11 / Д12 / Д13 (D series - portable)
- Lomo Biolam C1 / C2 / C3 / C11 / C12 / C13 (S series - for students)
- Lomo Biolam P1 / P2 / P3 / P4 / P5 / P6 / P7 / P11 / P12 / P13 / P14 / P15 / P16 / P17 (R series - working microscopes)
- the microscopes sold in Germany under the names Bresser Biolam and Bresser Erudit, including the newest ones with illumination integrated into the base
- and the same microscopes sold in the United Kingdom under the name Zenith Biolam

Some of the microscope versions listed above were originally sold with the LOMO AU-12 binocular head, yet on the second-hand market they often turn up with monocular heads. That is exactly why I have listed them here.

ЛОМО marked the series in Cyrillic letters, so the letter engraved on the microscope does not always mean what it seems to mean at first glance: Д stands for the Latin D, but the Russian C is read as S and the Russian P as R.

The same models in the notation used on Western markets:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4 / R-5 / R-6 / R-7
- Lomo Biolam D-11 / D-12 / D-13
- Lomo Biolam S-11 / S-12 / S-13
- Lomo Biolam R-11 / R-12 / R-13 / R-14 / R-15 / R-16 / R-17

You will find a comparison table of the first generation Lomo Biolam microscope models (with one digit in the model name) here: https://www.microscopeparts.eu/photo/99964-1.

You will find a comparison table of the second generation Lomo Biolam microscope models (with two digits in the model name) here: https://www.microscopeparts.eu/photo/99983-5.

# Examples of use
- as a service part to fit into the monocular head of a LOMO Biolam microscope, when the head you are using has no glare stop or a damaged one

# Removed from microscope:
Lomo Biolam

# Also compatible with the following microscopes:
- Lomo Biolam
- Bresser Biolam
- Lomo Biolam D11
- Lomo MBP-1
- Lomo Erudit
- Lomo Biolam 70
- Bresser Erudit

# Names, descriptions, terms, and search contexts under which this part is searched.
- Lomo Biolam microscope repair parts
- Lomo Biolam Mikroskopbild milchig
- Lomo Biolam microscope image looks milky
- Bild kontrastarm Mikroskop Monokularkopf
- low contrast image microscope monocular head
- Reflexe in der Bildmitte Mikroskop
- bright spot in the centre of microscope image
- Flares bei der Mikrofotografie Lomo Biolam
- flares when taking photos through Lomo Biolam
- Streulichtblende Monokularkopf Lomo Biolam
- light baffle for Lomo Biolam monocular head
- Bresser Biolam Blende im Kopf fehlt
- Bresser Biolam baffle missing from head
- schwarze Kunststoffblende zerbröselt
- black plastic baffle crumbled away
- Aluminium Ringschwalbe spiegelt Lomo Biolam
- bare aluminium dovetail reflects light
- Lichtfalle Mono-Kopf Lomo Biolam Ersatzteil
- glare stop for Lomo Biolam monocular tube
- Bresser Biolam Bild unscharf und flau
- Bresser Biolam image soft and washed out
- altes Lomo Mikroskop restaurieren Blende
- restoring a Lomo Biolam monocular head
- mlecny obraz v mikroskopu Lomo Biolam
- imagen lechosa en microscopio Lomo Biolam
- reflejos en el cabezal monocular Bresser Biolam
- immagine lattiginosa al microscopio Lomo Biolam
- riflessi nella testa monoculare Bresser Biolam
- mleczny obraz w mikroskopie Lomo Biolam
- Lomo buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99980.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99980.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99980-lomo-biolam-light-baffle-for-microscope-monocular-head-bresser-biolam-and-erudit-compatible
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99980.media.md
- Representative photo: https://www.microscopeparts.eu/photo/lomo-biolam-light-baffle-for-microscope-monocular-head-bresser-biolam-and-erudit-compatible-99980-2
- Other parts from category Service and spare parts: https://www.microscopeparts.eu/service-and-spare-parts
- More Service and spare parts removed from microscope Lomo Biolam: https://www.microscopeparts.eu/service-and-spare-parts/from/lomo/biolam
- More Service and spare parts compatible with microscope Lomo Biolam: https://www.microscopeparts.eu/service-and-spare-parts/for/lomo/biolam
- More Service and spare parts removed from microscopes Lomo: https://www.microscopeparts.eu/service-and-spare-parts/from/lomo
- More Service and spare parts compatible with microscopes Lomo: https://www.microscopeparts.eu/service-and-spare-parts/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: 2026-11-01