# Part name:
Lomo WI 30x 0,90 L microscope objective (fluorescence water immersion, iris RMS 30x / 1974)

# Original page URL:
https://www.microscopeparts.eu/part/lomo-ml-2-wi-30x-0-90-l-microscope-objective-fluorescence-water-immersion-iris-rms-30x-1974-00869

# 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:
Microscope objective with RMS thread, 30x magnification, very high, variable numerical aperture, built-in iris diaphragm, designed for water immersion and improved correction for fluorescence illumination.

Manufacturer: Lomo
Model: WI 30x0.90 L
Manufacturer code: O5V-30L
Magnification: 30x
Numerical aperture: variable from 0.65 to 0.90
Iris diaphragm: yes, built-in
Optical correction: achromat + fluorescence
Tube length: 160 mm
Focal length: 33 mm
Immersion: yes, water
Cover glass: yes, 0.17 mm
Marking: "L" = luminescence
Thread: RMS
Year of manuractue: 1974

This is a rare, professional microscope objective with a very wide range of applications. Main features that make this objective exceptional:
- Water immersion is preferred by many users over oil immersion
- Very high numerical aperture (up to 0.90) provides high-resolution images
- Built-in iris diaphragm allows adjustment of the aperture

Despite the "L" marking, the objective can of course also be used with standard illumination.

LOMO objectives with the "L" luminescence marking differ from those without this symbol by:
- Improved transmission in the UV and blue spectral range
- Lower glass autofluorescence
- No or strongly reduced use of organic adhesives

# Examples of use
- If you want to upgrade your Lomo microscope with original parts
- If you need a 30x water immersion objective lens for Lomo, Carl Zeiss Jena, PZO, IOR, or other microscopes requiring 33mm and 160mm lenses
- If you have a Lomo microscope from 1974 (the serial number begins with "74") and want original-era objectives
- If you don't like oil immersion but want better image quality than standard, dry 30x objectives

# Removed from microscope:
Lomo ML-2

# Also compatible with the following microscopes:
- Lomo ML-2
- Lomo Biolam
- Lomo Biolam D11
- Lomo MBI-1
- Lomo MBR-3
- IOR ML-4M
- Carl Zeiss Jena Lg
- Carl Zeiss Jena Lumipan
- Lomo MBB-1

# Names, descriptions, terms, and search contexts under which this part is searched.
- Lomo ML-2 microscope repair parts
- Lomo ML-2 luminescence microscope objective
- Lomo ML-2 Lumineszenz Mikroskopobjektiv
- Lomo ML-2 fluorescence microscope objective
- Lomo ML-2 Fluoreszenz Mikroskopobjektiv
- Lomo 30x 0
- 90 luminescence water immersion microscope objective iris diaphragm
- Lomo 30x 0
- 90 Lumineszenz Wasserimmersion Mikroskopobjektiv mit Irisblende
- Lomo 30x 0
- 90 fluorescence water immersion microscope objective iris diaphragm
- Lomo 30x 0
- 90 Fluoreszenz Wasserimmersion Mikroskopobjektiv mit Irisblende
- Lomo Biolam microscope
- Lomo Biolam Mikroskop
- Lomo buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/00869.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/00869.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/00869-lomo-ml-2-wi-30x-0-90-l-microscope-objective-fluorescence-water-immersion-iris-rms-30x-1974
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/00869.media.md
- Representative photo: https://www.microscopeparts.eu/photo/lomo-ml-2-wi-30x-0-90-l-microscope-objective-fluorescence-water-immersion-iris-rms-30x-1974-00869-2
- Representative video: https://www.microscopeparts.eu/play/00869-1
- Other parts from category Objective: https://www.microscopeparts.eu/objective
- More Objective removed from microscope Lomo ML-2: https://www.microscopeparts.eu/objective/from/lomo/ml-2
- More Objective compatible with microscope Lomo ML-2: https://www.microscopeparts.eu/objective/for/lomo/ml-2
- 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: 2026-06-30