# Part name:
Lomo WI 40 0.75 microscope objective (water immersion, RMS 40x / 1991)

# Original page URL:
https://www.microscopeparts.eu/part/lomo-biolam-wi-40-0-75-microscope-objective-water-immersion-rms-40x-1991-90736

# 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:
40x RMS microscope objective lens with increased numerical aperture and water immersion.

Manufacturer: Lomo
Model: WI 40 0.75
Magnification: 40x
Numerical aperture: 0.75
Tube length: 160 mm
Focal length: 33 mm
Immersion: yes, water immersion
Thread: RMS
YOM: 1991

# Examples of use
- If you want to upgrade your Lomo microscope with original parts
- If you need a 40x 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 1991 (the serial number begins with "91") and want original-era objectives
- If you don't like oil immersion but want better image quality than standard, dry 40x objectives

# Removed from microscope:
Lomo Biolam

# Also compatible with the following microscopes:
- 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
- Lomo ML-2

# Names, descriptions, terms, and search contexts under which this part is searched.
- Lomo Biolam microscope repair parts
- mikroskop
- microscope
- Lomo Biolam
- Bresser Biolam
- Carl Zeiss Jena Lumipan
- Carl Zeiss Jena Lg
- IOR ML-4M
- Lomo 40x objective
- Lomo 40-fach Objektiv
- obiektyw
- wasser immersion
- water immersion
- immersja wodna
- BN
- WI
- Lomo buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/90736.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/90736.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/90736-lomo-biolam-wi-40-0-75-microscope-objective-water-immersion-rms-40x-1991
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/90736.media.md
- Representative photo: https://www.microscopeparts.eu/photo/lomo-biolam-wi-40-0-75-microscope-objective-water-immersion-rms-40x-1991-90736-2
- Other parts from category Objective: https://www.microscopeparts.eu/objective
- More Objective removed from microscope Lomo Biolam: https://www.microscopeparts.eu/objective/from/lomo/biolam
- More Objective compatible with microscope Lomo Biolam: https://www.microscopeparts.eu/objective/for/lomo/biolam
- 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: 2026-07-31