# Part name:
Lomo WI 40 0.75 L microscope objective (fluorescence water immersion, RMS 40x / 1974)

# Original page URL:
https://www.microscopeparts.eu/part/lomo-ml-2-wi-40-0-75-l-microscope-objective-fluorescence-water-immersion-rms-40x-1974-00867

# 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 and 40x magnification, featuring increased numerical aperture, designed for water immersion and optimized optical correction for fluorescence illumination.

Manufacturer: LOMO
Model: WI 40 0.75 L
Magnification: 40x
Numerical aperture: 0.75
Optical correction: achromat, optimized for fluorescence microscopy
Tube length: 160 mm
Focal length: approx. 33 mm
Immersion: water
Designation: L = luminescence
Thread: RMS
Year of manufacture: 1974

Despite the L designation, the objective can of course also be used with standard transmitted light illumination.

LOMO objectives marked with L luminescence differ from non-marked versions by:
- improved transmission in the UV and blue spectral range
- reduced autofluorescence of optical glass
- no or strongly reduced use of organic adhesives in the optical assembly

# 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 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 40x 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
- 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
- fluoresnencja
- fluorescence
- luminescence
- fluoreszenz
- limineszenz.
- Lomo buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/00867.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/00867.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/00867-lomo-ml-2-wi-40-0-75-l-microscope-objective-fluorescence-water-immersion-rms-40x-1974
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/00867.media.md
- Representative photo: https://www.microscopeparts.eu/photo/lomo-ml-2-wi-40-0-75-l-microscope-objective-fluorescence-water-immersion-rms-40x-1974-00867-2
- 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