# Part name:
Lomo OI-35 Microscope Illuminator and Lomo BP Power Supply for Lomo Biolam Microscope

# Original page URL:
https://www.microscopeparts.eu/part/lomo-biolam-oi-35-microscope-illuminator-and-lomo-bp-power-supply-for-lomo-biolam-microscope-00683

# 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:
Illuminators

# Description and specifications:
Koehler-standard illumination kit for the Lomo Biolam microscope:
- Lomo BP power supply (transformer) with 220V/230V (outlet) > 8V/9V 25W (illuminator plug)
- Lomo OI-35 Koehler illuminator with field diaphragm
- illuminator plug with Lomo 8V 20W BA15d bulb

Fits microscopes including:
- Lomo Biolam
- Lomo Biolam M
- and certainly many other models (e.g., Polam)

A small, non-Koehler illuminator for these microscopes is the Lomo OI-21, which is mounted on a base like the OI-35 (and therefore does not use a mirror). The Lomo OI-19 is an external illuminator that shines onto the mirror. The Lomo OI-35 uses the same filament bulb as these two, but now allows for Koehler standard lighting.

Koehler standard lighting allows for the best image quality when working with oil immersion or phase contrast.

The last photos are an example of use.

# Examples of use
- If you're still using a mirror and want to install an illuminating lamp
- If you're using lighting without the Koehler standard and need higher image quality.

# Removed from microscope:
Lomo Biolam

# Also compatible with the following microscopes:
- Lomo Biolam-M
- Lomo Biolam
- Lomo Biolam D11

# Names, descriptions, terms, and search contexts under which this part is searched.
- Lomo Biolam microscope repair parts
- Lomo OI-19
- Lomo OI-21
- Lomo OI-35 Koehler Mikroskopbeleuchter
- Köhler Beleuchter
- Lampe
- illuminator
- Lamp
- trafo
- transformer
- power supply
- oświetlacz mikroskopowy
- lampa do mikroskopu
- zasilacz mikroskopowy
- Lomo buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/00683.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/00683.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/00683-lomo-biolam-oi-35-microscope-illuminator-and-lomo-bp-power-supply-for-lomo-biolam-microscope
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/00683.media.md
- Representative photo: https://www.microscopeparts.eu/photo/lomo-biolam-oi-35-microscope-illuminator-and-lomo-bp-power-supply-for-lomo-biolam-microscope-00683-2
- Other parts from category Illuminators: https://www.microscopeparts.eu/illuminators
- More Illuminators removed from microscope Lomo Biolam: https://www.microscopeparts.eu/illuminators/from/lomo/biolam
- More Illuminators compatible with microscope Lomo Biolam: https://www.microscopeparts.eu/illuminators/for/lomo/biolam
- More Illuminators removed from microscopes Lomo: https://www.microscopeparts.eu/illuminators/from/lomo
- More Illuminators compatible with microscopes Lomo: https://www.microscopeparts.eu/illuminators/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: 2026-07-31