# Part name:
Meopta RU2 / DRU-3 polarizing microscope monocular eyepiece head with adjustable draw tube with 150 mm - 190 mm scale

# Original page URL:
https://www.microscopeparts.eu/part/meopta-dru-3-ru2-dru-3-polarizing-microscope-monocular-eyepiece-head-with-adjustable-draw-tube-with-150-mm-99573

# Part manufacturer:
Meopta

# Full manufacturer name:
Meopta s.r.o.

# Other names of this manufacturer:
- Meopta Praha
- Meopta Prerov
- Optikotechna
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:
Heads

# Description and specifications:
Monocular eyepiece head with an adjustable draw tube providing a variable tube length from 150 mm to 190 mm for the Meopta RU2 / DRU-3 polarizing microscope.

This is a dedicated eyepiece head for a polarizing microscope. It features:
- an adjustable draw tube with an engraved 150 mm – 190 mm scale
- a groove at the top of the eyepiece tube for locking the polarizing eyepiece in a fixed rotational position
- a locating pin (threaded pin) in the dovetail mount securing the head to the microscope body, allowing the head to be locked in a fixed position

Basic dimensions and specifications:
Compatible eyepiece diameter: 23.2 mm
Microscope body mounting type: dovetail
Dovetail diameter: 40.5 mm (compatible with, among others, Carl Zeiss Jena and Lomo microscopes)
TL scale range: 150 mm to 190 mm

The adjustable draw tube allows the use of microscope objectives corrected for different tube lengths (TL), for example:
- common polarizing objectives with TL = 160 mm (e.g. Carl Zeiss Jena and most other manufacturers)
- commonly encountered objectives with TL = 170 mm (e.g. older Leitz Wetzlar or Meopta)
- polarizing objectives with TL = 190 mm (e.g. Lomo)

Important: When calculating the total tube length (TL), the thickness of the mounting flange of the microscope eyepiece must also be taken into account.

# Examples of use
- if you own a Meopta polarizing microscope with a missing head
- if you own such a head but it is of very poor quality or damaged
- if you would like to keep such a head as a spare part
- if you would like to install it in another microscope

# Removed from microscope:
Meopta DRU-3

# Also compatible with the following microscopes:
- Meopta DRU-3
- Meopta RU2

# Names, descriptions, terms, and search contexts under which this part is searched.
- Meopta DRU-3 microscope repair parts
- Meopta polarizing microscope head
- Meopta RU2 polarizing microscope monocular with draw tube
- Meopta Polarisationsmikroskop Monokulares Kopf
- Meopta DRU-3 Monokular für 23
- 2 mm Okulare
- głowica do mikroskopu polaryzacyjnego Meopta
- Meopta buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99573.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99573.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99573-meopta-dru-3-ru2-dru-3-polarizing-microscope-monocular-eyepiece-head-with-adjustable-draw-tube-with-150-mm
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99573.media.md
- Representative photo: https://www.microscopeparts.eu/photo/meopta-dru-3-ru2-dru-3-polarizing-microscope-monocular-eyepiece-head-with-adjustable-draw-tube-with-150-mm-99573-2
- Representative video: https://www.microscopeparts.eu/play/99573-1
- Other parts from category Heads: https://www.microscopeparts.eu/heads
- More Heads removed from microscope Meopta DRU-3: https://www.microscopeparts.eu/heads/from/meopta/dru-3
- More Heads compatible with microscope Meopta DRU-3: https://www.microscopeparts.eu/heads/for/meopta/dru-3
- More Heads removed from microscopes Meopta: https://www.microscopeparts.eu/heads/from/meopta
- More Heads compatible with microscopes Meopta: https://www.microscopeparts.eu/heads/for/meopta

# 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: 2026-07-12