Home page of the microscope service parts, repair and spare parts online catalog - Sermik-Oplatek Mikroskopservice Dresden f.n.n.Z

Description of this part for the microscope.

tube
Stand mount: 41 mm dovetail
Head mount: 41 mm dovetail
Inherent magnification: none (1.0x)

Interestingly, the head has a slot for slide inserts (e.g., color, fluorescence, or polarizing filters).

Because IOR produced microscopes modeled after the Carl Zeiss Jena and Lomo, many (most) IOR parts are compatible with microscopes from these manufacturers.

Description of this part for the microscope.

mounted above it. The equivalent of the Zeiss IM 35 (IM-35, IM35) microscope is the Opton ICM 405 (ICM-405, ICM405).

Description of this part for the microscope.

2 mm.

The engraved scale from 150 mm to 200 mm allows for:
- achieving zoom in <> zoom out
- supporting lenses with FL=160/170 and 190 mm

Description of this part for the microscope.

use of Lomo lenses with an RMS thread and a TL of 190mm (most often EPI lenses). The mount is a 41.5mm dovetail, the Carl Zeiss Jena standard.

Description of this part for the microscope.

B (no additional magnification)
- 1.3x
- 2x
- 3x

This is an optional component - an accessory for the Patholux microscope. The magnification changer is mounted between the body and the microscope head.

Description of this part for the microscope.

After attaching a binocular head, the complete assembly forms a full trinocular head.

Basic features:
- dovetail connection for mounting a binocular microscope head
- upper dovetail connection for mounting a photographic adapter
- a tube adapter for 23.2 mm projection eyepieces is currently mounted on this connection
- operating modes: manually switchable light beam split 0 / 100 or 100 / 0

This microscope element is also referred to as:
- photographic adapter
- trino dome
- photo intermediate tube

It is POSSIBLE that this photo tube also fits other microscopes manufactured by Vickers. Detailed mounting interface dimensions will be added soon, which will allow verification of compatibility with other models.

As of today, this adapter is known to fit the following microscopes:
- Vickers Patholux
- Vickers Patholette

Note - please pay attention to paint damage and scratches. These occurred during transport and do not affect optical quality or the operation of this microscope element, but they do reduce its external condition. I did not hide or repaint them so that you have full insight into the actual condition of the item.

Description of this part for the microscope.

installed. It enables ergonomic work with the microscope by tilting the observation head at an angle.

Note - this is not a tube with a photo port (that is, it is not a so-called "trino"). It is a tube intended for mounting a binocular head and it does not have a third optical light path.

Other names used for this microscope part:
- Angle tube
- Angular tube
- Inclined tube
- Intermediate tube
- Angle intermediate tube
- Inclined intermediate tube

Description of this part for the microscope.

Microscope

This tube will likely fit Zeiss inverted microscopes, like the Zeiss Observer or its predecessors.

Description of this part for the microscope.

6x
Angle: 30°

Other names for this part:
- intermediate tube
- mirror tube

Description of this part for the microscope.

tube.
Application: Zeiss Axio microscopes, second series
Manufacturer number: 425503-9901-000
Light split: 0/100 and 100/0

This trinocular photo tube contains a Zeiss infinity correction tube lens 425308-0000-000.

Parameters of the Zeiss 425308 lens:
Lens type: correction lens (en: infinity corrected tube lens)
Magnification: none (i.e. 1x)
Wavelength range: 380 - 700 nm
Diameter: 40 mm
Length: 12.8 mm
Thread: M36 x 0.75

The Zeiss tube lens 425308-0000-000 is required to use infinity-corrected Zeiss microscope objectives on microscopes from other manufacturers - including those designed for 160 mm tube length. It is also very often used in super macro photography to connect infinity-corrected objectives to a camera.

This element can be a solution to the following issues:
- How to repair or replace the prism in the Zeiss 425503 photo tube?
- What to do in case of prism delamination in the Zeiss 425503 head?
- Repair of a mechanically damaged Zeiss 425503 trinocular tube
- What to do if the Zeiss "tube lens" 425308 is damaged, scratched, or of poor quality?
- Can Zeiss objectives be used on microscopes from other manufacturers?
- Can infinity-corrected objectives be used on a 160 mm microscope?
- How to take super macro photos using infinity-corrected microscope objectives?

And once again at the end: carefully look at the photos. Note that this trinocular (photo tube) does not include a binocular eyepiece head.

Description of this part for the microscope.

This element provides an ergonomic, inclined positioning of the head relative to the user's eyes.

The element with manufacturer part number 452907 consists of two main parts:
- angle tube
- binocular head (also referred to as binocular).
Here, only the angle tube is shown and offered, without the binocular head.

Basic parameters:
- mounting to microscope stand: 57 mm dovetail
- mounting of the head to the angle tube: three screws

Important: other Zeiss binocular models can also be mounted on this angle tube, not only the one originally installed in the Zeiss P/N 452907 head.

Description of this part for the microscope.

for taking microscope photographs or recording microscope videos. This is a gray photographic adapter.

Basic technical parameters:
- mounting connection to microscope stand: 41 mm dovetail
- output connection type on the photo port: 49 mm internal thread
- connection for binocular head mounting: Jena standard 41 mm dovetail
- magnification directed to the binocular head: 1.6x
- magnification on the photo output: none (that is 1.0x)

Because this photo head has a 49 mm threaded output, virtually any device, camera, adapter, tube or other accessory can be connected after using an appropriate 49 mm thread adapter. Direct projection technique may be used (because there is no additional optics inside), or any projection eyepieces may be installed in the optical path.

This photographic attachment is intended mainly (but not exclusively) for the following microscope models:
- Carl Zeiss Jena Eduval
- Carl Zeiss Jena Laboval
- Carl Zeiss Jena Ergaval
- Carl Zeiss Jena Amplival
- Carl Zeiss Jena Vertival
- Carl Zeiss Jena Epival
- Carl Zeiss Jena Metaval
- Carl Zeiss Jena Telaval
- Carl Zeiss Jena Pictoval
- Carl Zeiss Jena Epignost

The list above contains Mikroval series microscopes with gray housings - just like the tube shown and offered here. However, it also works with older black Carl Zeiss Jena microscopes:
- Carl Zeiss Jena L-Stativ (models Lg, Lu and Lr)
- Carl Zeiss Jena Lumipan
- Carl Zeiss Jena Ng
- Carl Zeiss Jena Nf (and NfPk)

Please note that microscopes from other manufacturers also use the 41 / 41.5 mm dovetail connection standard. Because of this, this photographic head can also be used with microscopes made by:
- Lomo (for example Lomo Biolam)
- Meopta
- IOR
- selected Reichert microscopes (for example Reichert Neozet)
- Will Wetzlar
- Hund Wetzlar
- Leitz Wetzlar

This Carl Zeiss Jena tube is also very often used with microscopes having a larger head mounting diameter. In such cases users apply additional spacer or thickening rings. Because of this, this photo adapter also fits microscopes from manufacturers such as:
- PZO (for example the PZO Biolar model with 43 mm connection)
- Olympus (for example the Olympus CH model with 42 mm connection)

The element that allows a photographic camera or imaging camera to be connected to Carl Zeiss Jena Mikroval series microscopes may be referred to by different names. Commonly used names include:
- trino head
- trinocular head
- photo head
- photographic head
- photo attachment
- photographic attachment
- photo adapter
- photographic adapter
- photo tube
- photographic tube
- phototube
- photographic angle tube
- and various combinations of the words head, attachment, adapter or tube with terms such as photo, photographic, for camera and similar

Description of this part for the microscope.

Leica DMLM
This element provides an ergonomic, inclined positioning of the head relative to the user's eyes.

The element with manufacturer part number 501501 consists of two main parts:
- angle tube
- binocular head (also referred to as binocular).
Here, only the angle tube is shown and offered, without the binocular head.

Basic parameters:
- mounting to microscope stand: 44,5 mm dovetail
- mounting of the head to the angle tube: three screws

This angle tube can solve the following problems in Leica DMLB / DMLS microscopes:
- if the plastic housing of the angle tube from head P/N 501501 becomes damaged (for example cracked after a fall)
- if the internal prism inside the angle tube from head P/N 501501 becomes damaged: chipped, damaged by fungus, discolored or delaminated
- if the lower lens (from the microscope body side) or upper lens (under the binocular head) inside the angle tube from head P/N 501501 becomes damaged, scratched or loses its anti-reflection coating

Description of this part for the microscope.

Leica DMLM
This element provides an ergonomic, inclined positioning of the head relative to the user's eyes.

The element with manufacturer part number 501055 consists of two main parts:
- angle tube
- binocular head (also referred to as binocular).
Here, only the angle tube is shown and offered, without the binocular head.

Basic parameters:
- mounting to microscope stand: 44,5 mm dovetail
- mounting of the head to the angle tube: three screws

This angle tube can solve the following problems in Leica DMLB / DMLS microscopes:
- if the plastic housing of the angle tube from head P/N 501055 becomes damaged (for example cracked after a fall)
- if the internal prism inside the angle tube from head P/N 501055 becomes damaged: chipped, damaged by fungus, discolored or delaminated
- if the lower lens (from the microscope body side) or upper lens (under the binocular head) inside the angle tube from head P/N 501055 becomes damaged, scratched or loses its anti-reflection coating

Description of this part for the microscope.

at the end of the microscope arm and performs several functions:
- a microscope head is mounted on its top side (monocular, binocular or trinocular photographic head)
- inside there is a slide containing a polarizing analyzer that can be moved out of the optical path using a switch
- a polarizing objective nosepiece is mounted to the underside of this component

In the last photo, an arrow indicates which component is being offered and where it is located in the microscope, making it possible to identify this part unambiguously. In addition, the attached video shows the mechanism responsible for moving the polarization analyzer.

Description of this part for the microscope.

Carl Zeiss Jena, PZO, Meopta, Olympus, IOR and others.

This tube makes it possible to connect a camera or photographic camera to a trinocular head or directly to the microscope body, even when no trinocular head is installed.

Originally, this adapter was designed for the Lomo TRN-1 trinocular head. This head was used in Lomo Polam polarizing microscopes from the early 1970s onwards.

Several remarks regarding the model designation of the trinocular head for which this component was originally intended:
- the name Lomo TRN-1 is the Latin alphabet designation. In Cyrillic script the model designation appears as TPH (for example model TPH1Y4.2), and this designation is used in the manual for the Lomo Polam L-211 microscope
- the vast majority of these trinocular heads are not marked with any model designation
- the Envirotools website http://www.envirotools.hu/ateso_fenyu_polarizacios_mikroszkop.htm refers to this trinocular head as HU-POL

In the last photograph, an arrow indicates exactly which component is being offered and where it is located in the Lomo Polam microscope, allowing this part to be identified unambiguously.

Basic technical parameters of this tube:
Mounting method to the trinocular head or microscope: 41 mm dovetail mount (this is also the Carl Zeiss Jena standard)
Camera mounting method: male M39 thread
Alternative camera mounting method: since the M39 thread can be removed, a plain smooth tube with a diameter of 35 mm remains
Additional optics: yes, the original optics are installed inside, although they can be removed, leaving only an "empty tube".

This is not "a tube dedicated to a specific microscope model". It is a tube originally mounted on the third port (photo port) of a trinocular head. Since a trinocular head can be installed on microscopes other than the model with which it was originally supplied, this tube can be regarded as a universal accessory.

These technical parameters make it possible to use this tube with virtually any microscope manufactured by:
- Lomo (for example Biolam, Polam, MBB-1A and others)
- Carl Zeiss Jena (for example Ergaval, Amplival, Jenamed and others)
- IOR, Meopta and other manufacturers using a 41 / 41.5 mm dovetail mount

In addition, a 41 mm dovetail tube can easily be mounted on microscopes equipped with a 42 mm or 43 mm opening, for example:
- Olympus (for example CH, CH-2, BH-2 models)
- PZO (for example Biolar, Studar, MB-30 and others)

The entire list of microscope manufacturers and models given above may also be treated as a list of microscopes compatible with the Lomo TRN-1 trinocular head. Indeed, many examples can be found on the Internet showing this head being used with microscopes made by manufacturers other than Lomo.

Because this tube is equipped with an M39 thread by default, almost any camera or photographic camera can be attached by means of a suitable adapter, for example:
- devices with M42 threads
- devices with C-mount threads
- Nikon, Sony, Olympus and other camera standards

This is therefore a universal photo tube featuring a 41 mm dovetail on one side and either an M39 thread or a 35 mm tube on the other side.

In the image gallery, every photograph includes a millimetre scale, and in addition, the dimensions of the dovetail, tube and thread have been measured with calipers so that compatibility can be determined precisely.

Description of this part for the microscope.

This is the intermediate tube, forming the main optical module of the microscope. It is mounted onto the microscope stand, while the binocular viewing head is then attached to the top of this intermediate tube. The module incorporates the following components:
- a third optical path (photo port), which is why this module is sometimes referred to as a trinocular unit
- a Bertrand lens (indicating that this is the newer version of this intermediate tube), with a control knob for inserting the lens into the optical path
- a dovetail mount for the objective nosepiece together with a clamping screw for securing the nosepiece
- slots for sliding inserts, including a polarizing analyzer

In addition, the entire module rotates smoothly. Because of its complex mechanical and optical design, it is a component in which individual internal parts may occasionally become damaged.

Information from the manufacturer's English-language catalogue "Zetopan Research Microscope. Price List, Effective December 1, 1976":
- This component belongs to the microscope stand. The catalogue number of the stand is: 9 90 00 01
- English name of this component: swing-out tube carrier, deviating prism for observation and photomicrography, swing-out Bertrand lens

Over the years, Reichert manufactured Zetopan microscopes in three different colours: black, silver and cream. The intermediate tube offered here is the silver version. The different versions differ only in colour and can be exchanged between Reichert Zetopan microscopes. This means that this silver intermediate tube can be fitted to a black Zetopan microscope, although the colour combination may not be aesthetically pleasing.

Description of this part for the microscope.

(Phomi) microscopes.

This is an intermediate tube forming the main optical module of the microscope. It is mounted onto the microscope arm, and the binocular head is then attached to this intermediate tube. The module integrates the following components:
- a third optical path (photo output), which is why this module is sometimes referred to as a trinocular tube
- an Optovar magnification changer with a Bertrand lens
- a dovetail mount for the objective revolver
- a large insert for a round filter and slots for additional inserts

This intermediate tube is compatible with the following microscopes:
- Zeiss Universal (Carl Zeiss Standard Universal)
- Zeiss Photomicroscope (Zeiss Phomi)

The Optovar magnification changer integrated into this intermediate tube features a rotating turret with the following positions:
- PH (Bertrand lens)
- 1.25×
- 1.6×
- 2×

The complexity of this design makes the module susceptible to damage of individual internal components, especially the optical elements (prisms and lenses).

Description of this part for the microscope.

a modular photo output. Inside the fixed part of the trinocular, which is integrated with the head housing, sits a tube into which a photo eyepiece can be inserted. The manufacturer calls this element a "photographic lens holder".

Since the inner diameter of this tube is 23.2 mm, it takes the Nikon CF PL2.5X, Nikon PLI 5 and other photo eyepieces with this standard mounting diameter.

Inside this tube there is a helicoid mechanism for adjusting parfocality, so the sharpness of the image on the sensor of a camera can be tuned precisely.

The last three photos in the gallery have an arrow marking which element this is and where exactly it sits in the head of the stereo microscope. This allows unambiguous identification.

Description of this part for the microscope.

removed from an Olympus U-TR30 trinocular head.

The Olympus U-TR30 / U-TR30-2 photo-trinocular heads are most often used in the following microscopes:
- Olympus CX30 / CX31
- Olympus CX40 / CX41 / CX43
- Olympus BX40 / BX41 / BX43
- Olympus BX50 / BX51 / BX53
- Olympus BX60 / BX61
- Olympus MX40 / MX50
- and probably others

Olympus offers a whole range of tubes with a 42.1 mm mounting diameter, so such mounts are fitted not only to the U-TR30 head.

The female mount for adapters with a 42 mm dovetail (more precisely, according to the manufacturer specification: 42.1 mm) is found, among others, on the following microscope heads and tubes:
- Olympus U-TR30
- Olympus U-TR30-2
- Olympus U-TR30H
- Olympus U-TR30IR
- Olympus U-TR30NIR
- Olympus U-TTR-2
- Olympus U-ETR3
- Olympus U-ETR30
- Olympus U-ETR-4
- Olympus U-SWTR
- Olympus U-SWTR-2
- Olympus U-SWTR-3
- Olympus U-SWETR
- Olympus U-SWETTR-2
- Olympus U-SWETTR-5
- Olympus MX-SWETTR
- Olympus U-CTR30-2
- Olympus U-TRU
- Olympus U-TRUS
- Olympus U-MPH
- Olympus U-TLU
- Olympus SZX-TR30
- Olympus SZX2-TTR
- Olympus SZX2-TTRPT
- and probably others

Important: as of now (2026) the microscope brand "Olympus" has been replaced by "Evident". Evident microscopes (e.g. Evident BX53) still keep the previous standard, so the 42mm mount is also found in products carrying that brand.

Metal, cast or injection-molded parts of Olympus carry their own numbers. This microscope element bears the number AB8980.

Because this is a brittle casting, the mount can crumble, crack or break. The remedy is then to replace the complete head or just this part - fortunately this mount is a separate component, fixed to the head with three screws.

And this implies another important matter: the diameter of the mount is standard, but I cannot guarantee that a mount fixed with exactly three screws fits every one of those heads and tubes, and even if it does - whether their hole spacing is the same in each of those models. The user should check that for himself based on the photos in the gallery.

Where the descriptions quoting a 51 mm diameter come from?
On the website of "Martin Microscope" and in many other descriptions available online, exactly the same (sic!) mount is described as having a diameter of 51 mm. That is the internal diameter of the ring, measured without the seat of the dovetail taper. So the 51 mm at "Martin Microscope" refers to the same mount into which a 42 mm dovetail is inserted.

This is not a part for one specific microscope model. As listed above - such a mount can be found in many heads and tubes, and these in turn in any microscope the user fits them into.

In the "compatibility" section there is an example list of microscopes the U-TR30 head fits, although it is not a complete list.

Description of this part for the microscope.

from a Zeiss 452143 microscope head - but most probably it also fits other heads of the Zeiss AIM systems and of Zeiss Axioplan 2 microscopes, for example:
- Zeiss 452142
- Zeiss 452143
- Zeiss 452145
- Zeiss 452146

These photo-trino heads which I listed above are used, directly or through suitable adapters, among others in the following microscopes:
- Zeiss Axioplan 2
- Zeiss Axioskop 2
- Zeiss Axiophot 2
- Zeiss AIM
- Zeiss Axiotech
- and probably others

Basic parameters of this tube:
Mounting to the trinocular head: with 3 screws
Overall length: 50 mm
Length protruding above the housing of the head: approx. 25 mm
Inner diameter: 30 mm - for use with photo / projection eyepieces of this diameter
Camera installation possible: yes, a so-called USB eyepiece can be mounted in this tube
Centering: yes, the mounted camera or eyepiece can be centered with three centering screws

VERY IMPORTANT: this short tube (it can also be called a holder of the photo projection eyepiece) is screwed to the head with 3 (three) screws. In the photo only 2 (two) are visible - and this is exactly the item I am offering here, because I lost one of the screws. It is a minor thing - but it has to be mentioned.

In the last photo an arrow shows where this part is located in the head, so that it can be identified without any doubt.