# Part name:
A0,3 top lens for Lomo OI-14 oblique light DIC-like microscope condenser

# Original page URL:
https://www.microscopeparts.eu/part/lomo-biolam-a0-3-top-lens-for-lomo-oi-14-oblique-light-dic-like-microscope-condenser-99331

# 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:
Lenses

# Description and specifications:
Top lens with low numerical aperture A 0.3 for the Lomo OI-14 oblique light condenser.

Note: the designation OI-14 is written in the Latin alphabet. On the condenser, the model name is written in Cyrillic and looks similar to ON-14.

The Lomo OI-14 condenser has a removable (unscrewable) top lens:
- A1.4 with high aperture, for use with objectives with high numerical aperture (which corresponds to high magnifications, it can be assumed above 40x)
- A0.3 with low aperture, for use with low magnification objectives

Although it is possible to work with low magnification objectives (e.g. 5x or 10x) using a condenser with the A1.4 lens installed - the image is too "sharp" and contrasty. In this case, replacing the lens with A0.3 allows obtaining a pastel, soft and visually pleasant image.

Since the Lomo OI-14 condenser has been produced since the 1960s, over the years this additional lens has very often been lost and most condensers available on the secondary market have only one - most often A1.4.

The Lomo OI-14 condenser has a mounting diameter of 37 mm, but since it is very popular among microscope users, an extension ring is often used, allowing it to be mounted in microscopes with a 39.5 mm condenser holder. This condenser fits microscopes from various manufacturers: Lomo, PZO, Zeiss, Carl Zeiss Jena, Meopta, IOR, Olympus, ROW, Nikon, Leitz Wetzlar and many others.

# Examples of use
- if you have a Lomo OI-14 condenser without any lens
- if you have a Lomo OI-14 condenser only with the A1.4 lens and want to have both

# Removed from microscope:
Lomo Biolam

# Also compatible with the following microscopes:
- Lomo Biolam
- Lomo MPD-1
- Lomo Biolam-I
- Lomo MBB-1
- Lomo M-9
- Lomo Biolam D11
- Lomo MBI-1
- Lomo MBR-3
- Lomo MBP-1
- Lomo Erudit
- Lomo Biolam 70
- Olympus CK2
- Lomo BP
- Olympus CH-2 CHT
- Olympus CH

# Names, descriptions, terms, and search contexts under which this part is searched.
- Lomo Biolam microscope repair parts
- Lomo Biolam microscope OI-14 DIC-like oblique condenser top lens
- Obere Linse für Lomo OI-14 (ON-14) Schräglicht Mikroskopkondensor (DIK-ähnlich)
- Lomo MBR-3 Mikroskop OI-14 Kondensor
- górna soczewka kondensora światła ukośnego Lomo
- Lomo buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99331.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99331.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99331-lomo-biolam-a0-3-top-lens-for-lomo-oi-14-oblique-light-dic-like-microscope-condenser
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99331.media.md
- Representative photo: https://www.microscopeparts.eu/photo/lomo-biolam-a0-3-top-lens-for-lomo-oi-14-oblique-light-dic-like-microscope-condenser-99331-2
- Other parts from category Lenses: https://www.microscopeparts.eu/lenses
- More Lenses removed from microscope Lomo Biolam: https://www.microscopeparts.eu/lenses/from/lomo/biolam
- More Lenses compatible with microscope Lomo Biolam: https://www.microscopeparts.eu/lenses/for/lomo/biolam
- More Lenses removed from microscopes Lomo: https://www.microscopeparts.eu/lenses/from/lomo
- More Lenses compatible with microscopes Lomo: https://www.microscopeparts.eu/lenses/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