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.

special diaphragms was supplied. The set included phase contrast diaphragms and dark field diaphragms.

Note - I am showing and offering here one single diaphragm in holder - exactly the one visible in the photos. This is a phase contrast diaphragm (phase annulus). The complete set for the Lomo Polam microscope contains 5 diaphragms.

Important note:
Such diaphragms in a special holder, supplied as a set of five diaphragms, were an accessory for the Lomo Polam polarizing microscope. These diaphragms are mounted onto the polarizing microscope condenser in order to combine these observation techniques and obtain a phase image in polarized light. Please note that the same condensers can also be used in Lomo MIN series polarizing microscopes (for example Lomo MIN-6 or Lomo MIN-8 models) and in Lomo MIK series infrared microscopes (for example Lomo MIK-4). This means that there is nothing preventing the use of these phase annuli in those microscopes as well.

The newest version of the Lomo Polam microscope, namely the Lomo Polam LMPR model, no longer requires this accessory. The Lomo Polam LMPR already has a special polarizing phase contrast disc condenser (somewhat similar to the Lomo KF-4 condenser).

In the last photo in the gallery you can see a page from the Lomo Polam microscope manual where this element is shown. In the manual it is shown in figure number 6, element number 65.
The complete instruction manual for the Lomo Polam microscope is available here: https://www.facebook.com/groups/102512763506243/?multi_permalinks=1858054457952056

Description of this part for the microscope.

special diaphragms was supplied. The set included phase contrast diaphragms and dark field diaphragms.

Note - I am showing and offering here one single diaphragm in holder - exactly the one visible in the photos. This is a special diaphragm with a small light aperture. The complete set for the Lomo Polam microscope contains 5 diaphragms.

Important note:
Such diaphragms in a special holder, supplied as a set of five diaphragms, were an accessory for the Lomo Polam polarizing microscope. These diaphragms are mounted onto the polarizing microscope condenser in order to combine these observation techniques and obtain a phase image in polarized light. Please note that the same condensers can also be used in Lomo MIN series polarizing microscopes (for example Lomo MIN-6 or Lomo MIN-8 models) and in Lomo MIK series infrared microscopes (for example Lomo MIK-4). This means that there is nothing preventing the use of these phase annuli in those microscopes as well.

The newest version of the Lomo Polam microscope, namely the Lomo Polam LMPR model, no longer requires this accessory. The Lomo Polam LMPR already has a special polarizing phase contrast disc condenser (somewhat similar to the Lomo KF-4 condenser).

In the last photo in the gallery you can see a page from the Lomo Polam microscope manual where this element is shown. In the manual it is shown in figure number 6, element number 65.
The complete instruction manual for the Lomo Polam microscope is available here: https://www.facebook.com/groups/102512763506243/?multi_permalinks=1858054457952056

Description of this part for the microscope.

magnification is very often used as a projection eyepiece for microphotography.

This eyepiece works with any microscope from any manufacturer that allows the use of eyepieces with a mounting diameter of 23.2 mm.

Description of this part for the microscope.

wide-field eyepieces for a stereo microscope
Eyepiece magnification: 6.25x
Intended for: LOMO MPC-2 microscope
Mounting diameter: 40 mm (yes, forty millimetres)

Note - "MPC" is written in Cyrillic, therefore the model designation in the Latin alphabet is MPS-2.

Description of this part for the microscope.

for a stereo-microscope
Eyepiece magnification: 25x
Intended for: LOMO MPC-2 microscope
Mounting diameter: 40 mm (yes, forty millimetres)

Note - "MPC" is written in Cyrillic, therefore the model designation in the Latin alphabet is MPS-2.

Description of this part for the microscope.

visual observation and image capture (photography or video recording) on the LOMO MBC-10 (Lytkarino) stereo microscope.

The designation MBC-10 is the Cyrillic spelling. The equivalent name written in the Latin alphabet is MBS-10.

The MBC-10 microscope was also sold under the following names:
- OGME-P3
- SF-100 (name used in the USA)
- Silver Connection MBC-10 (mainly on the German market)

These are exactly the same microscopes, therefore this trinocular attachment is also compatible with those models.

Manufacturer: LZOS Lytkarino
Manufacturer information: LOMO is commonly but incorrectly listed as the manufacturer
Model: MFU
Year of manufacture: 1995
Component type: photographic adapter / trinocular attachment
Light split: 50% of the light from one optical path is directed to the photographic output
Simultaneous observation: yes, the adapter operates in simul-focal mode and does not interrupt simultaneous viewing
Camera connection: M42 thread - with an appropriate adapter virtually any camera or imaging device can be connected

Mechanically, this photographic attachment is installed between the magnification changer and the binocular head.

Various names are commonly used for this camera adapter on the secondary market and in microscope literature, including:
- SF-FA (the name used in the USA)
- trinocular head
- trinocular attachment
- trinocular tube
- trino
- photo tube
- phototube
- photo adapter
- photographic adapter
- camera adapter
- camera attachment
- photo port
- camera port
- photo output
- camera output
- photomicrography adapter
- microscope camera adapter
- microscope photo adapter
- photo head
- camera head
- simul-focal adapter
- M42 photo adapter
- M42 camera adapter
- MBS-10 camera port
- stereo microscope photo tube

It is worth noting that this photo tube is not compatible with MBC-1, MBC-2 or MBC-9 stereo microscopes and does not fit any biological microscope - including biological microscopes manufactured by LOMO.

Description of this part for the microscope.

although incorrectly, referred to as "Lomo")
Model: 20 0,40
Magnification: 20x
Correction: Achromat
Numerical aperture: 0.40
Tube length: 160 mm
Focal length: 33 mm
Cover glass: 0.17 mm
Immersion: no
Thread: RMS
Serial number: 01234

It can be used with any microscope from any manufacturer. Of course, the microscope must be compatible, i.e. support RMS objectives, TL=160 mm and FL=33 mm.

After installing a 12 mm adapter, this combination of adapter and objective will function as an objective with FL=45 mm.

This objective is attractive mainly to collectors because:
- there are very few microscope objectives with the LZOS logo on the secondary market
- the objective has a so-called "golden serial number": 01234

Description of this part for the microscope.

The light source is inserted into this housing (the standard light source in this model is an 8V 20W bulb). The entire housing is covered with dense metal fins acting as a heat sink to dissipate heat. At the end of this housing there is a condenser lens collimating the light beam and a dovetail mount. This mount is used to attach the condenser to the next element of the illumination path, namely the holder with a slot for insertable sliders.

The model designation MMU-3 is written using the Latin alphabet. When written in Cyrillic, this designation looks like MMY-3, and people unfamiliar with the Cyrillic alphabet may therefore refer to this microscope model in that way.

Interestingly, the dovetail connection used here has a diameter of 41.5 mm, which is the standard mounting diameter for accessories (for example microscope heads and intermediate tubes) not only in Lomo microscopes, but also in Carl Zeiss Jena, Romanian IOR, Czechoslovak Meopta and many other microscopes. For this reason, this lamp housing is sometimes used as an EPI reflected light source in various Carl Zeiss Jena microscope modifications.

In the last photograph, on the scanned page from the instruction manual of the Lomo MMU-1 microscope, an arrow indicates which element is being offered and where it is located in the microscope, allowing this part to be identified unambiguously.

Description of this part for the microscope.

microscope stage. It is also possible to mount a specialized stage on the side rails - these rails are visible in the photographs and are located on both sides of this stand base.

In the last photograph, on the scanned page from the Lomo MMU-1 microscope manual, an arrow indicates which component is being offered and where it is located in the microscope, allowing this part to be identified unambiguously.

Description of this part for the microscope.

mechanism is precise focusing - converting the horizontal movement of the adjustment knob into precise vertical movement.

Description of this part for the microscope.

their standard configuration were supplied with three wooden boxes:
- the main microscope case
- a smaller accessory case (Case No. 1)
- a larger wooden carrying case for accessories (Case No. 2)
The box presented here is Case No. 2. This particular example originally comes from a Lomo Polam L-211 microscope, but it can also be used to store accessories from other Lomo Polam models.

Various names are used on the secondary market for this type of wooden microscope box, including:
- wooden accessory box
- microscope accessory case
- microscope accessory storage case
- microscope accessory carrying case
- protective case for microscope accessories
- wooden storage case for microscope parts
- transport case for microscope components
- wooden instrument case
- fitted wooden case for microscope accessories
- wooden carrying case for microscope attachments
- storage box for microscope eyepieces and objectives
- original microscope accessory case

A millimetre scale is visible in all photographs, but I intentionally do not provide the dimensions of this case in the description, even though this would normally be considered good practice. I simply believe that mainly (or perhaps only?) users of Lomo Polam polarizing microscopes will be interested in it, as they may wish to store original accessories in an original wooden case.

The last photograph shows the original Lomo label with the factory arrangement of the contents of this case. This will definitely help the user place the appropriate components in the correct compartments.

Description of this part for the microscope.

their standard configuration were supplied with three wooden boxes:
- the main microscope case
- a smaller accessory case (Case No. 1)
- a larger wooden carrying case for accessories (Case No. 2)
The box presented here is Case No. 1. This particular example originally comes from a Lomo Polam L-211 microscope, but it can also be used to store accessories from other Lomo Polam models.

Various names are used on the secondary market for this type of wooden microscope box, including:
- wooden accessory box
- microscope accessory case
- microscope accessory storage case
- microscope accessory carrying case
- protective case for microscope accessories
- wooden storage case for microscope parts
- transport case for microscope components
- wooden instrument case
- fitted wooden case for microscope accessories
- wooden carrying case for microscope attachments
- storage box for microscope eyepieces and objectives
- original microscope accessory case

A millimetre scale is visible in all photographs, but I intentionally do not provide the dimensions of this case in the description, even though this would normally be considered good practice. I simply believe that mainly (or perhaps only?) users of Lomo Polam polarizing microscopes will be interested in it, as they may wish to store original accessories in an original wooden case.

The last photograph shows the original Lomo label with the factory arrangement of the contents of this case. This will definitely help the user place the appropriate components in the correct compartments.

Description of this part for the microscope.

light from the lamp into homogeneous illumination, makes the lamp filament invisible and ensures that the entire specimen is illuminated evenly.

The filter is mounted on a swing-out holder, which is a separate module installed below the condenser. This allows the entire frosted diffuser to be swung out of the optical path. In this position, for example, illumination according to the Koehler standard can be adjusted.

Users employ various names for the matt filter mounted below the condenser. These include:
- matt filter
- frosted filter
- ground glass diffuser
- diffuser
- diffuser filter
- frost filter
- opal diffuser
- diffusing screen
- condenser diffuser
- swing-out diffuser

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

The holder with the frosted diffuser fits every model of the Lomo Polam microscope series (the model designation written in Cyrillic is given in parentheses):
- Lomo Polam S-111 (the Cyrillic designation looks like C-111)
- Lomo Polam S-112 (C-112)
- Lomo Polam R-111 (P-111)
- Lomo Polam R-112 (P-112)
- Lomo Polam R-113 (P-113)
- Lomo Polam L-211
- Lomo Polam L-213
- Lomo Polam LMPR
- also Lomo Polam R-312 and Lomo Polam R-311 (the Cyrillic designation is P-312 and P-311), although in these models the matt filter below the condenser is usually not required because these microscopes are intended primarily for reflected light work

The final photograph, in which I indicate with an arrow the mounting position of the diffuser below the condenser, is a poster containing a comparison table of various Lomo Polam microscope models. It will help you easily identify which model of Lomo Polam polarizing microscope you own.

Description of this part for the microscope.

213) do not have a built-in illuminator integrated into the microscope stand. Instead, they use external Lomo illuminators mounted on the microscope, for example the simple Lomo OI-32 illuminator or the Lomo OI-35 Koehler illuminator.

Users who require a more powerful light source for their work (for example 100 W) often use external illuminators mounted on separate stands - and this mirror is used to redirect that light into the optical system. Users also frequently experiment with different types of illumination (quartz, halogen, red or fluorescent light) - and this mirror is intended for such applications as well.

Mechanically, the mirror is integrated with a mounting base having a diameter of 43.5 mm, exactly matching the opening in the microscope base. When installed in this way, the mirror is stable and allows comfortable operation with high-power external light sources.

The last photograph in the gallery is a poster containing a comparison table of various Lomo Polam microscope models. It allows you to see exactly where and which illuminators are mounted in different Lomo Polam microscopes - and therefore also where this mirror is installed.

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.

is to switch the reflected-light operating mode between darkfield and brightfield observation.

This slider is inserted into a slot located in the Lomo MMU-3 microscope between the microscope body and the lamp housing.

This slider has two positions:
1. Darkfield stop (darkfield disc). When the slider is set to this position, the microscope can be used for reflected-light darkfield observations.
2. Frosted diffuser filter with an iris diaphragm. When the slider is set to this position, the microscope can be used for reflected-light brightfield observations.

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

Description of this part for the microscope.

below the condenser. In most microscopes this module is installed, but it is a separate accessory and does not have to be present. Directly below it is the location where the component offered here is mounted.

This component performs at least two functions:
- it limits the vertical movement of the condenser and specifically prevents it from being lowered too far
- it acts as a blanking plate if there are no additional accessories installed below the condenser diffuser

However, if this component serves as a blanking plate, what other accessories can be mounted there? The most commonly encountered optional accessory for Lomo Polam microscopes is the Lomo MIP-2 monochromator (this is the model designation written in the Latin alphabet). Since this is optional equipment, this blanking plate performs its function exactly at this location.

This blanking plate is also attractive to users who need an original mounting point below the condenser (appropriate dovetail mount and clamping screw - this blanking plate provides all of these features) in order to attach their own DIY accessory intended to be placed in the optical path.

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

Description of this part for the microscope.

with the Lomo Polam polarizing microscope. The set included phase contrast diaphragms and dark field diaphragms. Here I present and offer a complete set.

Important note:
Such diaphragms in a special holder were supplied as a set of five diaphragms as an accessory for the Lomo Polam polarizing microscope. These diaphragms are mounted onto the polarizing microscope condenser to obtain a combination of these techniques and a phase image in polarized light. Please note that the same condensers can also be used in polarizing microscopes of the Lomo MIN series (for example Lomo MIN-6 or Lomo MIN-8 models) and in microscopes designed for infrared light work from the Lomo MIK series (for example Lomo MIK-4). This means that there is nothing preventing the use of these phase rings in those microscopes as well.

The latest version of the Lomo Polam microscope, namely the Lomo Polam LMPR model, no longer requires this accessory. The Lomo Polam LMPR already features a dedicated rotating polarizing phase condenser (somewhat similar to the Lomo KF-4 condenser).

The last photo in the gallery shows a page from the Lomo Polam microscope manual where this microscope part is presented. In the manual it is shown in figure number 6, item number 65.

If you have such a set but it is incomplete - browse this database - you will also find individual diaphragms offered separately - specifically to solve such situations.

Description of this part for the microscope.

microscopes

Lomo microscope compensating slider:
Factory marking: СЛ1/4λ
Crystal material: Mica
Optical retardation: 1/4 lambda (approx. 140 nm)
Orientation of optical axes: diagonal, 45 degrees relative to the slider body edge

Dimensions:
Total length: 80 mm
Insertion length: 60 mm
Width: 19 mm
Height: 7,5 mm

Quarter-wave compensating slider (quarter-wave plate) introducing a phase shift of 1/4 wavelength. Used for standard compensation, determination of the optical sign of minerals, and analysis of elliptically polarized light.

The axes of the fast ray (Np) and slow ray (Ng) are oriented at 45 degrees relative to the longitudinal axis of the slider. This is the standard configuration used in the vast majority of classic polarizing microscopes, where the accessory slot is parallel to the microscope arm and the vibration axes of the crystal must align precisely with the diagonal of the polarizer and analyzer directions.

A second variant of this slider is also available - of the Sénarmont type, designated by the abbreviation CP-QS (Compensating Plate, Quarter-wave Sénarmont). In the Sénarmont configuration, the crystal axis (Ng) runs parallel to the vibration direction of the polarizer, and the 45-degree effect is enforced by the microscope accessory slot - not by the orientation of the crystal within the body. The Sénarmont variant is intended for specialized LOMO microscope heads with a 45-degree-rotated accessory slot and for precise quantitative measurements of optical retardation in combination with a rotating analyzer and an interference filter (typically 546 nm or 551 nm). Before purchasing, please check the design of your microscope. Using the incorrect variant will cause the crystal axes to misalign with the vibration direction of the polarized light, preventing proper background extinction as well as precise measurements and conoscopic observations.

Description of this part for the microscope.

erpendicular/parallel axis - for Lomo Polam polarizing microscopes

Lomo microscope compensating slider:
Factory marking: СЛ1/4λ (Latin alphabet transcription: SL1/4lambda)
Alternative name: Sénarmont, CP-QS (Compensating Plate, Quarter-wave Sénarmont)
Crystal material: Mica
Optical retardation: 1/4 lambda (approx. 140 nm)
Orientation of optical axes: perpendicular and parallel to the slider body edge

Dimensions:
Total length: 80 mm
Insertion length: 60 mm
Width: 19 mm
Height: 7,5 mm

Quarter-wave compensating slider of the Sénarmont type (Sénarmont quarter-wave plate) introducing a phase shift of 1/4 wavelength. Unlike the standard quarter-wave plate, in the Sénarmont configuration the crystal axis (Ng) runs parallel to the vibration direction of the polarizer, and the 45-degree effect is enforced by the microscope accessory slot - not by the orientation of the crystal within the body. Used for precise quantitative measurements of optical retardation, determination of the optical sign of minerals, and analysis of elliptically polarized light - in combination with a rotating analyzer and an interference filter (typically 546 nm or 551 nm).

The axes of the fast ray (Np) and slow ray (Ng) are oriented parallel and perpendicular to the edges of the slider body. This arrangement is used in specific types of LOMO microscope heads or with a non-standard (rotated by 45 degrees) polarizer setup, in order to achieve the correct interference effect.

A first variant of this slider is also available - standard quarter-wave plate СЛ1/4λ (Latin alphabet transcription: SL1/4lambda) with diagonal axis (45 degrees), suitable for the vast majority of classic polarizing microscopes with a standard accessory slot. Before purchasing, please check the design of your microscope. Using the incorrect variant will cause the crystal axes to misalign with the vibration direction of the polarized light, preventing proper background extinction as well as precise measurements and conoscopic observations.

Description of this part for the microscope.

КВ.КР.1 (Latin alphabet transcription: KV.KR.1)
Crystal material: Quartz
Optical retardation: 1 lambda (approx. 550 nm)
Orientation of optical axes: perpendicular and parallel to the slider body edge

Dimensions:
Total length: 80 mm
Insertion length: 60 mm
Width: 19 mm
Height: 7,5 mm

Full-wave compensating slider (gypsum plate / first-order red plate) introducing a phase shift of one full wavelength. It produces the sensitive interference tint - the purplish-red of the first order - against which even minimal changes in the birefringence of the observed specimen become clearly visible as a shift toward blue or yellow tones. Used for identification of low-birefringence minerals and for determining the sign of elongation of crystals.

Description of this part for the microscope.

This microscope part performs two essential functions:
- mounting the microscope body onto the stand column
- providing coarse focus (macro movement) along the permanently mounted rack

More precisely, this assembly consists of the following components:
- stand column clamp
- stand column locking screw
- dovetail guide on which the microscope body with the optics moves
- rack on which the microscope body with the optics moves

Please note:
- the original Cyrillic designation of this model is: ЛОМО ММУ-3
- for people using the Latin alphabet who know that the manufacturer is "Lomo", it visually appears as: Lomo MMY-3
- however, the original designation is pronounced: Lomo MMU-3

The last photograph in the gallery includes an arrow indicating exactly which microscope part is being offered and where it is installed inside the microscope, making it easy to identify this component unambiguously.

Description of this part for the microscope.

part is an intermediate tube located in the optical path between the reflected-light illuminator with its condenser and the microscope body. It performs two functions:
- on one side it is attached to the microscope body, and this side contains the slot into which the iris diaphragm slide is inserted
- on the opposite side there is a dovetail mount for the illuminator assembly

Please note:
- the original Cyrillic designation of this model is: ЛОМО ММУ-3
- for users of the Latin alphabet who know that the manufacturer is "Lomo", the designation looks like: Lomo MMY-3
- however, the original designation is read as: Lomo MMU-3

The last photograph shows this microscope part indicated with an arrow and its exact position inside the microscope, allowing it to be identified unambiguously.

Description of this part for the microscope.

marking: none (variable retardation)
Crystal material: Quartz
Optical retardation: continuously variable, from 1st to 4th order of the interference spectrum
Orientation of optical axes: aligned with the insertion direction (retardation increases with insertion depth)

Dimensions:
Total length: 115 mm
Insertion length: 78 mm
Width: 19 mm

Compensating slider in the form of a quartz wedge with variable, increasing optical retardation. Allows precise, continuous adjustment of the compensation value by sliding the wedge within the microscope accessory slot. Used for accurate determination of the interference color order of observed specimens and for precise measurement of crystal birefringence.

Description of this part for the microscope.

nosepiece.

This holder is compatible with the following polarizing microscopes:
- Lomo Polam L-211
- Lomo Polam L-213
- Lomo Polam LMPR

The microscope models listed above are equipped with a removable 5-position objective nosepiece that can be removed and replaced with this single objective holder. A single-objective configuration has long been a standard solution in polarizing microscopy, and many users still prefer it today.

Simpler models, such as the Lomo Polam C-111 (Latin transcription S-111) and P-111 (Latin transcription R-111), do not have a removable objective nosepiece. Therefore, this holder is not compatible with those models.

Important:
The objective is not screwed directly into this holder. This holder does not have an RMS thread. It accepts objectives that have already been mounted in dedicated centering adapters. These adapters provide the precise objective centering required for polarizing microscopy.

The manufacturer illustrates this holder in Figure 4 of the instruction manual (item 47) and refers to it as щипцовое устройство (shchipcovoe ustrojstvo - pincer device).

Several names are commonly used for this component in documentation and among microscope users, including:
- single objective holder
- single objective mount
- objective holder
- objective clamp
- objective carrier
- pincer holder
- single objective nosepiece
- objective socket
- the English term "single objective microscope nosepiece" is very commonly used, even though it is technically associated with a revolving nosepiece

If you need additional comparison photographs, this database also contains:
- the 5-position objective nosepiece for this microscope model (part number 00798)
- the centering adapter for a single RMS objective (supplied together with the objective as part number 00772)

Description of this part for the microscope.

illuminator mount
- the arm containing the coarse focus (macro movement) and coaxial fine focus (micro movement) mechanism
- a pincer holder (single objective holder) for a polarizing microscope objective
- the microscope head mount – however, in Lomo Polam microscopes this position is first occupied by the intermediate tube with the polarization analyzer, and only then by the microscope head

The complete Lomo Polam R-113 / P-113 microscope body may be useful in the following situations:
- if you are building your own microscope by purchasing individual parts to assemble a configuration that fully meets your requirements
- if you own a Lomo Polam microscope but its body is heavily worn, damaged or incomplete, for example with defective coarse/fine focus controls, a damaged pincer objective holder or other mechanical problems

Lomo Polam microscopes are built around a standardized modular design. For example:
- components such as the stage holder, condenser holder, polarizing intermediate tube, monocular head or trinocular photo head from other Polam models (e.g. L-211 or L-213) are compatible with the R-113 / P-113 body
- the R-113 body can also be installed on other, including newer, Lomo Polam models, making it an inexpensive way to repair a microscope with a defective coarse/fine focus mechanism

Description of this part for the microscope.

for the large illuminator attached to the rear of the microscope
- a built-in right-angle mirror in the base that redirects the light beam. This mirror can be centered using two adjustment screws located on the front of the microscope base
- the focusing block with coarse focus (macro movement) and coaxial fine focus (micro movement)
- a mount for either the single objective holder (pincer holder) or the 5-position polarizing objective nosepiece
- the microscope head mounting point – however, in Lomo Polam microscopes a polarizing intermediate tube with the analyzer is mounted here first, followed by the microscope head

The complete body of the Lomo Polam L-211 microscope may be useful in the following situations:
- if you are building your own microscope by purchasing individual components to assemble a configuration that perfectly matches your requirements
- if you own a Lomo Polam microscope whose body is in very poor condition, damaged or incomplete, for example with non-functioning focusing controls, a damaged illuminator mount or other mechanical problems

Since this database includes both the body of the Lomo Polam R-113 (Полам Р-113) and the Lomo Polam L-211 (Полам Л-211), here is a brief summary of the differences between them:
- the Lomo Polam R-113 has no built-in illumination components in the base, only an opening for a mirror or an external light source
- the Lomo Polam L-211 has a built-in right-angle mirror in the base that redirects light from the rear illuminator vertically upward, and it also provides a mounting point for the large rear illuminator
- the Lomo Polam R-113 has a permanently installed single objective holder (pincer holder) for a polarizing objective
- the Lomo Polam L-211, on the other hand, has an interchangeable mount that accepts either a single objective holder (pincer holder) or a 5-position polarizing objective nosepiece

Lomo Polam microscopes feature a standardized modular design, which means, for example:
- components such as the microscope stage holder, condenser holder, polarizing intermediate tube, monocular head or trinocular photo head from other Polam microscope models (e.g. R-113, R-211 or L-213) are compatible with this L-211 body
- this L-211 body can also be installed on other Lomo Polam models, including older ones, making it an inexpensive way to upgrade an older Polam microscope, for example one with a damaged coarse/fine focusing block
- another interesting option is replacing only the base in order to equip simpler Lomo Polam microscopes with the powerful rear-mounted illuminator

An amusing curiosity. Users of Lomo Polam microscopes, especially those unfamiliar with the Cyrillic alphabet, sometimes misread the model designation of the Lomo Polam L-211.
- the original Cyrillic designation is: Л-211
- many users mistake the letter "Л" (L) for the letter "П" (P) because they have a very similar appearance in Cyrillic
- as a result, they incorrectly read the model designation as Lomo Polam P-211
- the funny part is that there actually is a microscope model called "ЛОМО Полам Р-211" – however, the Cyrillic letter "Р" corresponds to the Latin letter "R", which makes the confusion even greater

Description of this part for the microscope.

ameters:
Manufacturer: Lomo
Model: PLAN 25x0.50 P
Original designation: ЛОМО ПЛАН 25х0,50 П
Magnification: 25x
Numerical aperture N.A.: 0.50
Tube length: 160 mm
Cover glass: yes, 0.17 mm thickness
Immersion oil: no – this is a dry objective
Focal length: 45 mm
Thread type: RMS
Additional designation: P (Cyrillic: П) indicates that this objective is designed for use with polarized light
Special features: built-in iris diaphragm
Year of manufacture: 1976

This objective has a standard RMS thread and TL=160 mm, which means it can be used with the vast majority of microscopes from virtually any manufacturer, including Olympus, Zeiss, Nikon, PZO, Carl Zeiss Jena, Reichert, Wild and many others.

The built-in iris diaphragm allows, among other things, precise centering of the objective, because in a polarizing microscope the following diaphragms may operate simultaneously:
- field diaphragm in the illuminator
- aperture diaphragm (or two aperture diaphragms) in the condenser
- iris diaphragm in the microscope objective
- iris diaphragm in the eyepiece head
and accurate centering of all of them relative to each other is very important in polarized-light observations.

Objectives marked "P" / "Pol" feature a special construction in which the lenses are mounted and cemented in a way that prevents mechanical stress. They can be used both for conventional brightfield microscopy and for observations in polarized light.

Description of this part for the microscope.

220V - 240V
Output: 8V
Output power: 20W
Power plug: European flat plug
Potentiometer: yes, smooth brightness adjustment

Designed for:
- Lomo OI-21 illuminator
- Lomo OI-35 illuminator
- illuminator used with MBC-9 and MBC-10 stereo microscopes

Also compatible with older black Lomo microscopes:
- MBB-1
- MIN-8
- EPI reflected-light illuminators, including those used with the Lomo METAM and Lomo MMU-3
- and many others

Some older Lomo microscopes (for example, the MBC-1 and MBC-2 stereo microscopes) may use different connectors, but they use the same Lomo 8V 20W BA15d lamps.