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.

removed from a MBP-3 microscope. If (unfortunately) you decide to 3D print it, you can find it here .

Description of this part for the microscope.

inside the revolving nosepiece that gives you the audible, tactile click as you turn the objective revolver and that stops it in the right place. It is a plate with a recess into which the corresponding tooth drops.

This detent spring fits the objective nosepieces used in the following microscopes, among others:
- Lomo Erudit (ЛОМО Эрудит)
- Lomo Biolam 70
- Lomo Micmed 1
- Lomo Biolam Д1 / Д2 / Д3 (D series - portable)
- Lomo Biolam C1 / C2 / C3 (S series - for students)
- Lomo Biolam P1 / P2 / P3 / P4 / P5 / P6 / P7 (R series - working microscopes)

This detent spring also fits the objective revolvers from the Lomo Biolam models with the fine focus built into the base (these are the Biolam models with a two-digit model number, Дxx / Cxx / Pxx)
- Lomo Biolam Д11 / Д12 / Д13 (D series - portable)
- Lomo Biolam C11 / C12 / C13 (S series - for students)
- Lomo Biolam P11 / P12 / P13 / P14 / P15 / P16 / P17 (R series - working microscopes)

In addition, this detent spring fits the revolving nosepieces from the following microscopes:
- those sold in Germany under the names Bresser Biolam and Bresser Erudit, including the newest ones with illumination integrated into the base
- and the same microscopes sold in the United Kingdom under the name Zenith Biolam

Here you can see an objective nosepiece that this detent spring fits: https://www.microscopeparts.eu/part/99982.

You will find a comparison table of the first generation Lomo Biolam microscope models (with one digit in the model name) here: https://www.microscopeparts.eu/photo/99964-1.

You will find a comparison table of the second generation Lomo Biolam microscope models (with two digits in the model name) here: https://www.microscopeparts.eu/photo/99983-5.

You can read about the differences between the Lomo Erudit and the Lomo Biolam microscope here: https://www.microscopeparts.eu/microscope/lomo-erudit-207.

ЛОМО marked the series in Cyrillic letters, so the letter engraved on the microscope does not always mean what it seems to mean at first glance: Д stands for the Latin D, but the Russian C is read as S and the Russian P as R.

The same models in the notation used on Western markets:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4 / R-5 / R-6 / R-7
- Lomo Biolam D-11 / D-12 / D-13
- Lomo Biolam S-11 / S-12 / S-13
- Lomo Biolam R-11 / R-12 / R-13 / R-14 / R-15 / R-16 / R-17

Description of this part for the microscope.

head sits on the microscope body on a round aluminium dovetail (). The inner opening of this mount measures about 35 mm, while the angle prism inside the head () is only 17 mm wide (about 15 mm in effective width). To prevent artefacts such as reflections (flares) or a milky image, LOMO fitted a dedicated stop into the dovetail of the head, limiting the amount of light and shaping the beam that enters the head. This is the very part offered here.

Key data of this baffle:
Function: limiting the amount of light that reaches the prism inside the monocular head
Material: plastic
Colour: black
Outer diameter: 37 mm
Diameter of the inner opening: 13,5 mm
Fitting: pushed in from below into the mount of the monocular head - the part is press-fitted, not screwed in

Very important: this glare stop is made of very thin plastic. Over the years the material turns very (!) brittle - and that is why heads without this light stop turn up so often. For the same reason, unfortunately, you have to fit the insert into the head with great care, so that the plastic does not break during assembly.

With this black baffle missing, artefacts can appear that are visible to the naked eye or when taking photomicrographs with a camera or a mobile phone.

If the baffle is missing from the monocular tube of a Lomo Biolam microscope, putting one back in can help with the following problems:
- when the image is too milky, slightly soft and low in contrast. This may be caused by exactly that: too wide a beam reaching the prism. Note: the cause may also be eyepieces with too high a magnification
- when flares, reflections or overly bright areas show up in the image, especially in its centre. The cause may be light bouncing off the bare aluminium mount (the dovetail). The black glare stop covers precisely a part of that metal element.

Note: the newest microscopes of this class, especially those built after 1990 (later examples of the Lomo Micmed-1 as well as Bresser Biolam and Lomo Biolam with illumination built into the base), have a monocular head with an angular inclined tube. All older microscopes of this class have a head with a hemispherical inclined tube. The plastic glare stop offered here fits this ROUND version of the head (see the last photo in the gallery). The newer, angular heads do not have it.

So that you can tell exactly which version of the monocular head this black insert fits, the last two photos in the gallery show:
- the complete monocular head, with an arrow showing where the baffle sits inside it
- a close-up of the dovetail itself with the light stop in place

Monocular heads of this kind, the ones LOMO originally fitted these light baffles into, can be found in the following microscopes, among others:
- Lomo Erudit (ЛОМО Эрудит)
- Lomo Biolam 70
- Lomo Micmed-1
- Lomo Biolam Д1 / Д2 / Д3 / Д11 / Д12 / Д13 (D series - portable)
- Lomo Biolam C1 / C2 / C3 / C11 / C12 / C13 (S series - for students)
- Lomo Biolam P1 / P2 / P3 / P4 / P5 / P6 / P7 / P11 / P12 / P13 / P14 / P15 / P16 / P17 (R series - working microscopes)
- the microscopes sold in Germany under the names Bresser Biolam and Bresser Erudit, including the newest ones with illumination integrated into the base
- and the same microscopes sold in the United Kingdom under the name Zenith Biolam

Some of the microscope versions listed above were originally sold with the LOMO AU-12 binocular head, yet on the second-hand market they often turn up with monocular heads. That is exactly why I have listed them here.

ЛОМО marked the series in Cyrillic letters, so the letter engraved on the microscope does not always mean what it seems to mean at first glance: Д stands for the Latin D, but the Russian C is read as S and the Russian P as R.

The same models in the notation used on Western markets:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4 / R-5 / R-6 / R-7
- Lomo Biolam D-11 / D-12 / D-13
- Lomo Biolam S-11 / S-12 / S-13
- Lomo Biolam R-11 / R-12 / R-13 / R-14 / R-15 / R-16 / R-17

You will find a comparison table of the first generation Lomo Biolam microscope models (with one digit in the model name) here: https://www.microscopeparts.eu/photo/99964-1.

You will find a comparison table of the second generation Lomo Biolam microscope models (with two digits in the model name) here: https://www.microscopeparts.eu/photo/99983-5.

Description of this part for the microscope.

from the factory with five types of stage:
- small square, screwed on (in the portable models of the D series: LOMO Д1 / Д2 / Д3 / Д11 / Д12 / Д13)
- larger square, screwed on (in the student models of the S series: LOMO Biolam C1 / C2 / C3 / C11 / C12 / C13)
- round, rotating, interchangeable (in the working models of the R series: P1 / P2 / P3 / P4 / P11 / P12 / P13 / P14)
- large square with built-in mechanical XY movement (in a few models of the R series: P5 / P6 / P15 / P16)
- round, rotating, interchangeable, with built-in mechanical XY movement (in the P7 and P17 models)

No interchangeable stage could be fitted to a LOMO Biolam with a screwed-on stage, because those models have no stage carrier for it - all they have is the stage holder for the fixed stage.

The part offered here is an original adapter made by LOMO. It lets you upgrade exactly those models that otherwise take only fixed, screwed-on stages, so that they accept interchangeable stages as well - and not only round ones.

Why do I write that non-round interchangeable stages can be fitted, when none appear in the list above? Because this adapter will also take Carl Zeiss Jena stages on a Lomo Biolam - and that manufacturer offered interchangeable square stages with built-in mechanical XY movement too.

Key data of this stage carrier for interchangeable stages:
Manufacturer: LOMO (ЛОМО)
Fitting: the adapter is screwed onto the stage holder of the fixed stage with 4 screws (included)
Hole spacing: two rows of two screw holes each. Spacing in the first row (measured from hole centre to hole centre): 70 mm. The spacing of the second row, measured the same way: 41 mm. Diagonal distance between a hole in the first row and one in the second: 20 mm
Centering: yes, a stage sitting in this mount can be centered with two screws (included)
Rotation: yes, if the stage itself allows it (polarising stages, for example), it can be turned once mounted
Stages accepted: they need a round mounting boss 70 to 72.5 mm in diameter (this tolerance is allowed by the spring pressure screw and the centering screws)

A note on fitting: one of the four screws that fasten this adapter to the stage holder is shorter than the others - and has to be. You can see this in the gallery photos.

In the last photo in the gallery you will see a LOMO Biolam microscope with such a rotary stage mount fitted.

Over the years LOMO microscopes of the Biolam class were also sold under other names, for example:
- Lomo Erudit (ЛОМО Эрудит)
- Lomo Biolam 70
- Lomo Micmed-1
- Bresser Biolam
- Bresser Erudit
- Zenith Biolam
The adapter shown here of course fits those as well.

You will find a comparison table of the first generation Lomo Biolam microscope models (with one digit in the model name) here: https://www.microscopeparts.eu/photo/99964-1.

You will find a comparison table of the second generation Lomo Biolam microscope models (with two digits in the model name) here: https://www.microscopeparts.eu/photo/99983-5.

Here you will find a round, rotating LOMO stage that fits this mount: https://www.microscopeparts.eu/part/99291.

Description of this part for the microscope.

two main parts:
- the angled tube (German: Winkeltubus), hemispherical in shape and with an angled prism (German: Umlenkprisma) inside
- the ocular tube, a sleeve into which the eyepiece is inserted. This eyepiece tube can easily be unscrewed, as it has a thread at one end.

It is this second part - the eyepiece tube with a thread at one end - that I am offering here.

The basic technical data of this sleeve:
Overall length: 92 mm
Length of the threaded section: 6 mm
Outer diameter: 25 mm
Thread diameter: 25 mm as well
Inner diameter of the eyepiece mount, that is the diameter of the eyepieces that can be fitted: 23.2 mm

The last two photos in the gallery show a complete LOMO Biolam microscope with a monocular head carrying exactly this kind of eyepiece tube, together with a close-up of the monocular head itself. In both photos an arrow shows where this sleeve sits, so that it is unambiguous which part is meant.

Please note: the most recent versions of microscopes in this class, especially those built after 1990 (later examples of the Lomo Micmed-1 as well as Bresser Biolam and Lomo Biolam with illumination built into the microscope base), have a monocular head with a square angled tube. All older microscopes in this class have a head with a hemispherical angled tube. The eyepiece tube offered here fits this ROUND version of the head (see the last photo in the gallery). It does not fit the newer, square ones.

Replacing the ocular tube in the monocular head of LOMO Biolam microscopes can help with the following problems:
- when the microscope is simply missing this part because someone unscrewed it. The tube is sometimes unscrewed for transporting the microscope, or so that the microscope fits into its case - and it occasionally gets lost
- when the eyepiece sleeve you have is in poor cosmetic condition, for example scratched and with the paint rubbed off
- when the eyepiece cannot be inserted because the eyepiece barrel is bent. This happens often after a knock, as the tube protrudes beyond the outline of the microscope and is made of sheet metal only 0.9 mm thick

A sleeve like this, which has a 25 mm thread at one end and additionally takes microscope eyepieces 23.2 mm in diameter, is frequently used for building personal DIY projects in the fields of optics, microscopy and macro photography in particular.

Monocular heads of this kind, the ones LOMO originally fitted these eyepiece tubes to, were most often mounted on the following microscopes, among others:
- Lomo Erudit (ЛОМО Эрудит)
- Lomo Biolam 70
- Lomo Micmed-1
- Lomo Biolam Д1 / Д2 / Д3 / Д11 / Д12 / Д13 (the "D" series - portable models)
- Lomo Biolam C1 / C2 / C3 / C11 / C12 / C13 (the "S" series - student models)
- Lomo Biolam P1 / P2 / P3 / P4 / P5 / P6 / P7 / P11 / P12 / P13 / P14 / P15 / P16 / P17 (the "R" series - working models)
- sold in Germany under the names Bresser Biolam and Bresser Erudit, including the most recent versions with illumination integrated into the base
- and the same microscopes sold in the United Kingdom under the name Zenith Biolam

Although some of the microscope versions listed above were originally sold with the LOMO AU-12 binocular head, they are often found on the second-hand market with monocular heads. That is precisely why I have included them in the list here.

ЛОМО marked the series in Cyrillic, which is why the letter engraved on the microscope does not always mean what it appears to mean at first glance: Д is the Latin D, but the Russian C reads as S and the Russian P as R.

The same models as written on western markets:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4 / R-5 / R-6 / R-7
- Lomo Biolam D-11 / D-12 / D-13
- Lomo Biolam S-11 / S-12 / S-13
- Lomo Biolam R-11 / R-12 / R-13 / R-14 / R-15 / R-16 / R-17

A comparison table of first-generation Lomo Biolam microscope models (with one digit in the model name) can be seen here: https://www.microscopeparts.eu/photo/99964-1.

A comparison table of second-generation Lomo Biolam microscope models (with two digits in the model name) can be seen here: https://www.microscopeparts.eu/photo/99983-5.