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.

only the holder is provided).

Description of this part for the microscope.

20x / 0.45 oo/0.17-A
Color correction: Achromat
Numerical aperture: 0.45
Tube length: infinity
Focal length: not sure
Cover glass: 0.17 mm
Immersion: no
Thread: M25

This lens is often used with Leica microscopes (e.g., the DMLB, DMLS, or DM1000 models). It is often shorter than Leica objectives, but an extension adapter is used in these cases.

Description of this part for the microscope.

Achromat HI 100x / 1,25 oo/0.17-A
Color correction: Achromat
Numerical aperture: 1,25
Tube length: infinity
Focal length: not sure
Cover glass: 0.17 mm
Immersion: yes, oil
Thread: M25

This lens is often used with Leica microscopes (e.g., the DMLB, DMLS, or DM1000 models). It is often shorter than Leica objectives, but an extension adapter is used in these cases.

Description of this part for the microscope.

lens: yes
- Iris diaphragm: yes
- Type: Brightfield condenser for transmitted light

If you're not looking for this entire part, ask if I have separate components for sale, such as a screw-on ring or lenses.

Description of this part for the microscope.

two for each condenser. This offer is for a single centering screw.

Description of this part for the microscope.

Description of this part for the microscope.

rare on the used microscope market. It can be used with microscopes such as:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Description of this part for the microscope.

filter is exceptionally rare on the used microscope market. It can be used with microscopes such as:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Description of this part for the microscope.

I don't remember the specifications for the Jenatech.

Note: this is the version with the frosted glass; there are also versions without it.

Description of this part for the microscope.

documentation, this element is referred to in German as -Fototubus 100/100 und Tubusträger-.

This is a photographic tube on which a binocular microscope head is mounted - in this configuration it becomes a complete trinocular system. At the top there is an optical output where a camera or photographic device can be mounted.

Basic technical parameters:
- light beam splitting: 0/100 and 100/0
- head mounting method: dovetail 41.5 mm
- mounting method on the photographic port: dovetail 41.5 mm
- internal lens: additional Bertrand lens e.g. for phase contrast adjustment
- extras: slot for installing a filter wheel

Note - despite certain similarities, this microscope element DOES NOT FIT Carl Zeiss Jena Jenamed microscopes.

Description of this part for the microscope.

Jenalumar microscope.
This element has fins that function as a heat sink for heat dissipation.

Description of this part for the microscope.

This mounting screw fits most Carl Zeiss Jena microscopes of the CF250 series:
- Jenamed
- Jenaval
- Jenalumar
- Jenapol
- Jenatech
- Jenavert

Carl Zeiss Jena developed a complete modular microscope system based on connections using this type of screw. Therefore, this screw as a service part is also compatible with most accessories, modules and microscope elements that can be mounted to the microscope, including:
- magnification changers
- VIS analyzers
- trinocular heads
- Interphako heads

Important - carefully check the shape and dimensions of the screw to make sure it is the size you need. For example, the modular design of the Carl Zeiss Jena Amplival microscope is based on mounting screws of a different shape and size (search for it in this database to have a comparison).

Description of this part for the microscope.

Jenalumar 50

Please note the following:
- both microscopes listed here use this illuminator for EPI fluorescence, i.e. reflected light. This is not transmitted-light fluorescence.
- this illuminator requires a Carl Zeiss Jena SH 50 power supply for operation
- the Carl Zeiss Jena Jenalumar microscope was produced in two variants - this illuminator fits the Jenalumar version with two small, separate illumination modules
- information can be found on the Internet claiming that this illuminator is suitable for Carl Zeiss Jena Jenavert microscopes. This is NOT correct.
- an HBO lamp is not the same as an XBO lamp.
- Jenamed microscopes other than the "Fluorescence" version have a differently mounted head and this illuminator CANNOT be installed on them.

Important - operating used, overheated HBO lamps, lamps with unknown operating time or from an uncertain source may result in explosion, damage to the illuminator, contamination of the room and a risk to the user's life and health. For this reason, this illuminator DOES NOT INCLUDE a light source (i.e. it does not include the HBO mercury burner).

Description of this part for the microscope.

molded parts of Carl Zeiss Jena carry their own numbers. This microscope element bears the number 2580 (full designation: Si10 CZ 2580).

This is a service element (replacement part) for the trino head (head with photo output), suitable for Carl Zeiss Jena CF-250 microscopes. Please note that this is a microscope element for a microscope part (the trinocular head) and not a part for a specific microscope model.

Carl Zeiss Jena CF-250 microscopes have a modular design, and the microscope part to which the eyepieces are mounted (commonly referred to as the "head", "binocular" or "binocular tube") is a separate element from the angled tube (sometimes the German term "Winkeltubus" is used). If the angled tube has a photographic output, it is referred to as a "Fototubus". It is precisely for this microscope part that the upper main part of the housing is offered and described here.

Note - although the Carl Zeiss Jena Jenapol and Jenatech microscopes also belong to the CF-250 series, they have a differently constructed photographic output and this housing DOES NOT FIT them.

The exact dimensions of the described and offered microscope element can be seen in the gallery photos. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the head, in order to clearly identify this part.

Many different names are commonly used for the trino head. It is worth listing them here - each of them refers to the same microscope part.
- photo head
- trino head
- trinocular head
- trinocular head unit
- photo dome
- photo tube
- inclined tube with photo output

Description of this part for the microscope.

assembly of two lenses
- knob for moving and shifting the lenses
- mechanism for moving and shifting the lenses

Metal, cast or injection-molded parts manufactured by Carl Zeiss Jena have their own identification numbers. In this mechanism the lens is mounted on a cast part marked with number 2582 (full marking: Si10 CZ 2582).

This is a service element (repair part) of the trinocular head (photo tube), suitable for Carl Zeiss Jena microscopes of the CF-250 series. Please note that this is an element (component) of a microscope part (German: "Fototubus") and not a part dedicated to a specific microscope model.

Carl Zeiss Jena microscopes of the CF-250 series have a modular design and the microscope part to which the eyepieces are mounted (commonly referred to as "head", "binocular" or "twin tube") is a separate element from the angle tube (sometimes the German term "Winkeltubus" is used). If the angle tube has a photographic output, it is referred to as a "photo tube". The Bertrand lens offered and described here is intended specifically for this microscope part.

Hinweis - Carl Zeiss Jena microscopes Jenapol and Jenatech, although they also belong to the CF-250 series, have a differently designed photographic output and this mechanism DOES NOT FIT these models.

Hinweis - Carl Zeiss Jena also produced a simplified version of the photo tube which does not contain a Bertrand lens inside. In the image gallery there is also a page from the manufacturer's catalog so that it is visible whether these versions differ externally in appearance. This Bertrand lens shown and offered here CANNOT be installed in such a simplified version of the photo tube.

The photos visible in the gallery show the exact dimensions of the element described and offered here. Additionally, in the last photo an arrow indicates which element is concerned and where it is located in the head, in order to clearly identify this part.

In common usage many names are used for the photo tube. It is worth listing them here - each of them refers to the same microscope part.
- photo head
- trinocular head
- trinocular microscope head
- trinocular head assembly
- photo dome
- inclined tube with photo output

Description of this part for the microscope.

allows correction of vision in one eye and proper adjustment of image focus.

Basic parameters:
- Type: tube with diopter correction ring
- Diameter of supported eyepieces: 30 mm
- Color: white

Fits 30 mm heads used, among others, in the following Carl Zeiss Jena microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenatech
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert

Some Carl Zeiss Jena Jenalab and Jenamed microscopes (for example the Jenamed Fluorescence) were factory-equipped with binocular heads accepting 23.2 mm eyepieces. In that case this end cap is **not** compatible with that binocular head. By "that" I specifically mean the binocular head, as this is a component of the head rather than of the microscope itself.

Interestingly, 30 mm wide-field binocular heads are also occasionally fitted to older microscopes from the Mikroval series (for example Ergaval and Amplival). When combined with GF-Planachromat or GF-Planapochromat objectives (the latter also used on the Docuval), this provides arguably the best optical combination available for Carl Zeiss Jena microscopes with a 160 mm tube length.

Description of this part for the microscope.

250 series microscopes.
Note that this element is a component of a microscope element (the angled tube) and not a part dedicated to a specific microscope model.

This element fits, among others, the following Carl Zeiss Jena microscopes from the CF-250 series:
- Jenamed
- Jenaval
- Jenalumar
- Jenavert
- Jenatech
- Jenapol

Important: the element DOES NOT INCLUDE the screw used to secure the microscope head.

Inside this element there is a protective glass (without its own magnification, so called "zero lens") with a violet anti-reflection coating.
Although this holder for the binocular microscope head and the holder located at the photographic port look the same, have the same dimensions and are mechanically compatible - they are NOT (!) identical.
- the binocular microscope head mount contains a protective glass with a violet anti-reflection coating
- the mount located at the photographic port contains a protective glass with a green anti-reflection coating.

The photos visible in the gallery show the exact dimensions of the element described and offered here. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

250 series microscopes.
Note that this element is a component of a microscope element (the angled tube with photo port) and not a part dedicated to a specific microscope model.

This element fits, among others, the following Carl Zeiss Jena microscopes from the CF-250 series:
- Jenamed
- Jenaval
- Jenalumar
- Jenavert
- Jenatech
- Jenapol

Important: the element DOES NOT INCLUDE the screw used to secure the microscope head.

Inside this element there is a protective glass (without its own magnification, so called "zero lens") with a green anti-reflection coating.
Although this holder at the photographic port and the holder for the binocular microscope head look the same, have the same dimensions and are mechanically compatible - they are NOT (!) identical.
- the binocular microscope head mount contains a protective glass with a violet anti-reflection coating
- the mount located at the photographic port contains a protective glass with a green anti-reflection coating.

The photos visible in the gallery show the exact dimensions of the element described and offered here. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

Carl Zeiss Jena CF-250 microscopes have a modular design, and the microscope part to which the eyepieces are mounted (commonly referred to as the "head", "binocular" or "binocular tube") is a separate element from the angled tube (sometimes the German term "Winkeltubus" is used). If the angled tube has a photographic output, it is referred to as a "Fototubus". It is precisely for this microscope part that the element is offered and described here.

Note - although the Carl Zeiss Jena Jenapol and Jenatech microscopes also belong to the CF-250 series, they have a differently constructed photographic output and this part DOES NOT FIT them.

The exact dimensions of the described and offered microscope element can be seen in the gallery photos.

Description of this part for the microscope.

suitable for Carl Zeiss Jena CF-250 microscopes. Please note that this is a microscope element for a microscope part (the trinocular head) and not a part for a specific microscope model.

Carl Zeiss Jena CF-250 microscopes have a modular design, and the microscope part to which the eyepieces are mounted (commonly referred to as the "head", "binocular" or "binocular tube") is a separate element from the angled tube (sometimes the German term "Winkeltubus" is used). If the angled tube has a photographic output, it is referred to as a "Fototubus". It is precisely for this microscope part that the prism carrier is offered and described here.

Note - although the Carl Zeiss Jena Jenapol and Jenatech microscopes also belong to the CF-250 series, they have a differently constructed photographic output and this part DOES NOT FIT them.

The exact dimensions of the described and offered microscope element can be seen in the gallery photos. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the head, in order to clearly identify this part.

Many different names are commonly used for the trino head. It is worth listing them here - each of them refers to the same microscope part.
- photo head
- trino head
- trinocular head
- trinocular head unit
- photo dome
- photo tube
- inclined tube with photo output

Description of this part for the microscope.

Always exercise extreme caution when purchasing used mercury vapor lamps.

Technical specifications:
Manufacturer: VEB Narva
Type: HBO 200 F
Power: 200 watts
Lamp voltage: 50 - 65 V
Lamp current: 3.4 - 4.4 A DC
Warm-up time: 5 - 8 min
Ignition system: HF ignition
Rated service life: 200 h
Length: 100 mm
Width: 42 mm

Description of this part for the microscope.

rare on the used microscope market. It can be used with microscopes such as:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Description of this part for the microscope.

rare on the used microscope market. It can be used with microscopes such as:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Description of this part for the microscope.

rare on the used microscope market. It can be used with microscopes such as:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Description of this part for the microscope.

06 oo/-A
Magnification: 3.2x
Numerical aperture N.A.: 0.006
Optical correction: planachromatic
Additional: "GF" = Grossfeld, meaning a wide field objective
Tube length: infinity
Thread: M25
Cover glass: not required, may be present or not
Immersion: no

This objective fits, among others, the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar

For the Carl Zeiss Jena Jenamed microscope, this objective fits every variant:
- Carl Zeiss Jena Jenamed variant
- Carl Zeiss Jena Jenamed Fluorescence
- Carl Zeiss Jena Jenamed hematology
- Carl Zeiss Jena Jenamed cytology
- Carl Zeiss Jena Jenamed 2

The best image quality and full performance of this objective are achieved when using a Carl Zeiss Jena microscope head supporting 30 mm eyepieces and eyepieces marked "GF", meaning - similarly to the objectives - wide field eyepieces.

An interesting fact is that I very often see this objective (as well as other Carl Zeiss Jena objectives with M25 thread) mounted in Leica microscopes (for example Leica DMLB or Leica DMLS). Carl Zeiss Jena objectives are slightly shorter than Leica ones, so users apply extension adapters in such cases.

Description of this part for the microscope.

25 oo/-A
Magnification: 12,5x
Numerical aperture N.A.: 0.25
Optical correction: planachromatic
Additional: "GF" = Grossfeld, meaning a wide field objective
Tube length: infinity
Thread: M25
Cover glass: not required, may be present or not
Immersion: no

This objective fits, among others, the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar

For the Carl Zeiss Jena Jenamed microscope, this objective fits every variant:
- Carl Zeiss Jena Jenamed variant
- Carl Zeiss Jena Jenamed Fluorescence
- Carl Zeiss Jena Jenamed hematology
- Carl Zeiss Jena Jenamed cytology
- Carl Zeiss Jena Jenamed 2

The best image quality and full performance of this objective are achieved when using a Carl Zeiss Jena microscope head supporting 30 mm eyepieces and eyepieces marked "GF", meaning - similarly to the objectives - wide field eyepieces.

An interesting fact is that I very often see this objective (as well as other Carl Zeiss Jena objectives with M25 thread) mounted in Leica microscopes (for example Leica DMLB or Leica DMLS). Carl Zeiss Jena objectives are slightly shorter than Leica ones, so users apply extension adapters in such cases.

Description of this part for the microscope.

17-A
Magnification: 25x
Numerical aperture N.A.: 0.50
Optical correction: planachromatic
Additional: "GF" = Grossfeld, meaning a wide field objective
Tube length: infinity
Thread: M25
Cover glass: yes, 0,17 mm
Immersion: no

This objective fits, among others, the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar

For the Carl Zeiss Jena Jenamed microscope, this objective fits every variant:
- Carl Zeiss Jena Jenamed variant
- Carl Zeiss Jena Jenamed Fluorescence
- Carl Zeiss Jena Jenamed hematology
- Carl Zeiss Jena Jenamed cytology
- Carl Zeiss Jena Jenamed 2

The best image quality and full performance of this objective are achieved when using a Carl Zeiss Jena microscope head supporting 30 mm eyepieces and eyepieces marked "GF", meaning - similarly to the objectives - wide field eyepieces.

An interesting fact is that I very often see this objective (as well as other Carl Zeiss Jena objectives with M25 thread) mounted in Leica microscopes (for example Leica DMLB or Leica DMLS). Carl Zeiss Jena objectives are slightly shorter than Leica ones, so users apply extension adapters in such cases.

Description of this part for the microscope.

17-A
Magnification: 40x
Numerical aperture N.A.: 0.65
Optical correction: planachromatic
Additional: "GF" = Grossfeld, meaning a wide field objective
Tube length: infinity
Thread: M25
Cover glass: yes, 0,17 mm
Immersion: no

This objective fits, among others, the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar

For the Carl Zeiss Jena Jenamed microscope, this objective fits every variant:
- Carl Zeiss Jena Jenamed variant
- Carl Zeiss Jena Jenamed Fluorescence
- Carl Zeiss Jena Jenamed hematology
- Carl Zeiss Jena Jenamed cytology
- Carl Zeiss Jena Jenamed 2

The best image quality and full performance of this objective are achieved when using a Carl Zeiss Jena microscope head supporting 30 mm eyepieces and eyepieces marked "GF", meaning - similarly to the objectives - wide field eyepieces.

An interesting fact is that I very often see this objective (as well as other Carl Zeiss Jena objectives with M25 thread) mounted in Leica microscopes (for example Leica DMLB or Leica DMLS). Carl Zeiss Jena objectives are slightly shorter than Leica ones, so users apply extension adapters in such cases.

Description of this part for the microscope.

holder into which a round filter with a diameter of 32 mm can be inserted
- the hinged, tilting cover allows the light output to be completely blocked

This slide-in element is used in the following microscopes:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert

Cast or injection-molded metal parts of Carl Zeiss Jena carry their own numbers. This microscope element bears the numbers 2645 (full designation: Si10 2645) and 2683 (full designation: Si10 CZ 2683).

By default, in the basic versions of the CZJ Jenaval microscope, a simpler version of this element is installed - only a slide with a filter holder, without a light blocking cover.

In models with EPI illumination (de: Auflicht), such as Carl Zeiss Jena Jenavert and Carl Zeiss Jena Jenalumar, the transmitted light illuminator cover allows the transmitted light to be completely shut off when working exclusively with EPI illumination.

In the last photo in the gallery, the exact location of this element in the microscope is indicated with an arrow. This allows you to identify it precisely.

Description of this part for the microscope.

microscopes:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert

Cast or injection-molded metal parts of Carl Zeiss Jena carry their own numbers. This microscope element bears the number 2645 (full designation: Si10 2645).

In the last photo in the gallery, the exact location of this element in the microscope is indicated with an arrow. This allows you to identify it precisely.

Description of this part for the microscope.

commonly used in microscopes with a 30 mm eyepiece mounting diameter:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- Carl Zeiss Jena Jenvert
- Carl Zeiss Jena Jenatech
- Carl Zeiss Jena Jenalab

Interestingly, binocular heads with a 30 mm eyepiece mounting diameter are sometimes also installed in older microscopes of the Mikroval series (e.g. Ergaval and Amplival) - in such cases this eyepiece will also fit them, because - in general - eyepieces fit the head mounted on the microscope, not the microscope itself.

A single Carl Zeiss Jena PW 6.3x (25) eyepiece can solve the following problems:
- a second 6.3x eyepiece is missing to complete a pair
- a low magnification eyepiece is needed for use in a trinocular photo tube

Description of this part for the microscope.

Jena
Name: Grossfeld Binocular
Eyepiece mounting diameter: 30 mm
Microscope mount: 41 mm dovetail mount
Diopter adjustment: yes, for one eyepiece

The set also includes two eyepieces:
- Model: Carl Zeiss Jena GF-Pw 10x (25)
- Mounting diameter: 30 mm

This head is most commonly used in the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- Carl Zeiss Jena Jenvert
- Carl Zeiss Jena Jenatech
- Carl Zeiss Jena Jenalab

Interestingly, widefield binocular heads with a 30 mm eyepiece mounting diameter are sometimes also installed in older Mikroval series microscopes (for example Ergaval and Amplival). If the microscope is additionally equipped with GF-Planachromat series widefield objectives (or GF-Planapochromat objectives used in Docuval microscopes) - this creates the best possible combination for Carl Zeiss Jena microscopes with a 160 mm tube length.

This microscope head model is identical to the Baader Mark V binocular viewer used in astronomical telescopes and is often purchased by astronomy enthusiasts and adapted for telescope mounting.

Description of this part for the microscope.

Variant, Cytology, Hematology, Histology, Jenamed-2, Fluorescence)
- Jenapol
- Jenavert
- Jenaval
- Jenatech
- Jenalumar

Please note - this is only the adjustment knob, that is the knob used by the microscope user to make the illumination brighter or dimmer. It is not a potentiometer and therefore not a part of the electrical circuit.

This knob features the characteristic white cap used on Carl Zeiss Jena microscopes, which is often lost during decades of microscope use.

Mechanically, this knob is attached to the potentiometer. The fixing screw is covered by a white metal cap.

In the last photo I indicate with an arrow exactly which element it is and where it is located in a Carl Zeiss Jena Jenamed microscope. In Jenaval and Jenalumar microscopes it is located on the microscope base.

Description of this part for the microscope.

Amplival microscope
Number of lenses: 3
Numerical aperture N.A.: variable, from N.A. 0.16 to N.A. 1.4
Aperture diaphragm: yes, screwed on as a detachable module

The Carl Zeiss Jena pancratic condenser has three upper lenses:
- for working with low magnification objectives (usually up to 6.3x)
- Apl. 1.4 for working with high magnification objectives
- an oil immersion cardioid darkfield lens with N.A. = 1.05

Mechanically, this condenser is mounted on dovetail rails located on the microscope stage holder block.

Here are the mounting possibilities of the pancratic condenser to Carl Zeiss Jena microscopes:
- to Amplival, Docuval, Epival, Fluoval, Vertival microscopes, this condenser can be mounted directly
- to Ergaval, Nu, Nu 2, Nf microscopes, this condenser is mounted after unscrewing the aperture diaphragm from it
- to Jenaval, Jenapol, Jenalumar microscopes, this condenser can also be mounted, but it is installed together with the entire stage holder block from the Amplival microscope http://www.microscopy-uk.org.uk/mag/artfeb09/rs-jenalumar.html
- be careful, because the Lumipan microscope also features a pancratic condenser, but with a completely different mounting method

This condenser is often used as a "parts donor" for own DIY projects, for example:
- the Apl. 1.4 lens is often used to modify (upgrade) condensers with a lower numerical aperture N.A. in various microscopes
- the darkfield lens is very often used to build a standalone cardioid condenser
- the iris diaphragm has a very wide range of applications

On the last photo, an arrow indicates which element it is and where it is located in the microscope to clearly identify this part. Additionally, the attached video shows how the individual elements of this condenser move.

Description of this part for the microscope.

allows two filters to be inserted into the EPI optical path, for example a frosted diffuser filter, a blue colour-balancing filter or a green filter used to facilitate metallurgical observations.

The photographs in the gallery show the exact dimensions of this slide.

Description of this part for the microscope.

Carl Zeiss Jena microscope heads with a wide field of view (German: Grossfeld) have one eyepiece tube with diopter adjustment and a second one without it. Here I present the tube without diopter adjustment (straight eyepiece tube).

Basic parameters:
- Type: straight eyepiece tube
- Compatible eyepiece diameter: 30 mm
- Colour: white

Compatible with 30 mm microscope heads used, among others, in the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenatech
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert

Some Carl Zeiss Jena Jenalab and Jenamed microscopes (for example the Jenamed Fluorescence) were factory-equipped with binocular heads accepting 23.2 mm eyepieces. In that case this end cap is **not** compatible with that binocular head. By "that" I specifically mean the binocular head, as this is a component of the head rather than of the microscope itself.

Interestingly, 30 mm wide-field binocular heads are also occasionally fitted to older microscopes from the Mikroval series (for example Ergaval and Amplival). When combined with GF-Planachromat or GF-Planapochromat objectives (the latter also used on the Docuval), this provides arguably the best optical combination available for Carl Zeiss Jena microscopes with a 160 mm tube length.

Description of this part for the microscope.

hand when adjusting the interpupillary distance. It is a rounded metal cover that protects the eyepiece prism located underneath.

The last photo in the gallery shows a complete microscope head. An arrow indicates exactly which component is being described and where it is located inside the head, making it easy to identify.

Carl Zeiss Jena wide field microscope heads (those designed for 30 mm eyepieces) have two such components (two prism covers). They protect the prisms of the right and left eyepieces. Both covers are identical and interchangeable, so there is no constructional difference between the right-hand and left-hand cover.

This is a component for a microscope head, not for a specific microscope model.

This component fits microscope heads designed for 30 mm eyepieces used, among others, in the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenatech
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert

Some Carl Zeiss Jena Jenalab and Jenamed microscopes (for example the Jenamed Fluorescence) were factory-equipped with binocular heads accepting 23.2 mm eyepieces. In that case this end cap is **not** compatible with that binocular head. By "that" I specifically mean the binocular head, as this is a component of the head rather than of the microscope itself.

Interestingly, 30 mm wide-field binocular heads are also occasionally fitted to older microscopes from the Mikroval series (for example Ergaval and Amplival). When combined with GF-Planachromat or GF-Planapochromat objectives (the latter also used on the Docuval), this provides arguably the best optical combination available for Carl Zeiss Jena microscopes with a 160 mm tube length.

The Carl Zeiss Jena wide-field binocular head for 30 mm eyepieces is mechanically the same device as the Baader Mark V binocular viewer used with astronomical telescopes. They are based on the same binocular head; the Baader Mark V differs only in having a modified mounting interface, astronomical eyepiece adapters and, in some versions, different external markings. Consequently, the component offered here is also compatible with the Baader Mark V binocular viewer.

Metal cast or injection-moulded components manufactured by Carl Zeiss Jena have their own part numbers. This component is marked with the number 2630 (full designation: Si10 2630 / Si10 CZ 2630). In addition, the number "1" or "2" appears next to the part number to indicate whether it is the cover for the right-hand or left-hand prism. This is the only difference, because mechanically the right-hand and left-hand covers are identical.

Description of this part for the microscope.

the front, in the centre of the binocular head, between the two eyepiece tubes. It is a round cover plate (end cap) carrying a scale from 55 to 75 indicating the interpupillary distance (eyepiece tube spacing).

The last photograph in the gallery shows the complete binocular head. An arrow indicates the exact component being offered and its location within the head, allowing it to be identified unambiguously.

This is a component of the binocular head rather than a component dedicated to a particular microscope model.

This component fits 30 mm eyepiece binocular heads used, among others, on the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenatech
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert

Some Carl Zeiss Jena Jenalab and Jenamed microscopes (for example the Jenamed Fluorescence) were factory-equipped with binocular heads accepting 23.2 mm eyepieces. In that case this end cap is **not** compatible with that binocular head. By "that" I specifically mean the binocular head, as this is a component of the head rather than of the microscope itself.

Interestingly, 30 mm wide-field binocular heads are also occasionally fitted to older microscopes from the Mikroval series (for example Ergaval and Amplival). When combined with GF-Planachromat or GF-Planapochromat objectives (the latter also used on the Docuval), this provides arguably the best optical combination available for Carl Zeiss Jena microscopes with a 160 mm tube length.

The Carl Zeiss Jena wide-field binocular head for 30 mm eyepieces is mechanically the same device as the Baader Mark V binocular viewer used with astronomical telescopes. They are based on the same binocular head; the Baader Mark V differs only in having a modified mounting interface, astronomical eyepiece adapters and, in some versions, different external markings. Consequently, the component offered here is also compatible with the Baader Mark V binocular viewer.

Description of this part for the microscope.

microscope head to the microscope.

Basic specifications:
Mount type: dovetail
Diameter: 41 mm, the Carl Zeiss Jena and Lomo standard
Internal thread: 34 mm

The last photograph in the gallery shows a complete binocular head. An arrow indicates exactly which component is being offered and where it is located on the head, making visual identification straightforward.

This is a component of the microscope head rather than of any specific microscope model.

This component fits 30 mm binocular heads used, among others, on the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenatech
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert

This 41 mm Carl Zeiss Jena dovetail mounting standard is commonly used:
- if you want to perform a DIY conversion and mount a microscope head from another manufacturer onto a Carl Zeiss Jena or Lomo microscope
- if you want to connect another dovetail-mounted accessory to a Carl Zeiss Jena or Lomo microscope, such as an Optovar magnification changer, a polarisation intermediate tube, a DIC head or an EPI reflected-light illuminator
- if you want to use the 34 mm internal thread to mount a photographic tube for a camera

Description of this part for the microscope.

positions: 6
- Thread: M25
- Mounting method: screw-mounted to the intermediate bracket (nosepiece holder), between the nosepiece and the microscope body

The complete objective nosepiece module for Carl Zeiss Jena Jenalumar or Jenaval microscopes consists of:
- the objective revolver (also called the objective nosepiece, nosepiece disc or objective turret)
- the intermediate mounting bracket (nosepiece holder).

In both microscope models, the Carl Zeiss Jena Jenalumar and the Carl Zeiss Jena Jenaval, the first component—the objective revolver—is identical and interchangeable between the two models. Only the intermediate mounting bracket differs, as it attaches the revolver to the microscope arm. In other words, the nosepiece holder used in the Carl Zeiss Jena Jenalumar microscope is different from the one used in the Carl Zeiss Jena Jenaval microscope, but both holders have exactly the same objective revolver attached to them.

This offer includes only the objective turret, without the mounting bracket.

The gallery contains photographs of a Carl Zeiss Jena Jenalumar microscope arm, with the objective nosepiece indicated by an arrow to clearly show its location. It also includes photographs of the complete module consisting of the objective revolver and its holder for the Jenalumar microscope, making it clear how these two components are connected.

This database also contains, under item number 99388, the complete objective nosepiece module with its holder for the Carl Zeiss Jena Jenaval microscope.

Description of this part for the microscope.

knobs (via a pinion mounted on the shaft between the knobs) into the vertical movement of the integrated microscope stage and condenser support. This support is mounted on a dovetail guide, which is an integral part of the focusing block (included with this assembly).

This mechanism is suitable for the following microscope models:
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenavert

Description of this part for the microscope.

objective nosepiece and the microscope arm. In the Carl Zeiss Jena Jenalumar microscope, a fluorescence filter cube slides into position above the objective revolver. Inside this holder there is a longitudinal dovetail guide along which the fluorescence filter cubes slide. It also contains a spring steel detent that provides a distinct "click" to indicate the filter position as the fluorescence filter cube is moved along the dovetail guide.

The objective revolver is attached to this holder with screws, and the complete assembly consisting of the holder and objective turret is then screwed to the microscope arm.

The complete objective nosepiece module for Carl Zeiss Jena Jenalumar or Jenaval microscopes consists of:
- the objective revolver (also called the objective nosepiece, nosepiece disc or objective turret)
- the intermediate mounting bracket (nosepiece holder).

In both microscope models, the Carl Zeiss Jena Jenalumar and the Carl Zeiss Jena Jenaval, the first component—the objective revolver—is identical and interchangeable between the two models. Only the intermediate mounting bracket differs, as it attaches the revolver to the microscope arm. In other words, the nosepiece holder used in the Carl Zeiss Jena Jenalumar microscope is different from the one used in the Carl Zeiss Jena Jenaval microscope, but both holders have exactly the same objective revolvers attached to them.

This listing includes only the intermediate holder for the Carl Zeiss Jena Jenalumar model, without the objective nosepiece.

Interestingly, this component is made of aluminium, whereas the corresponding component performing the same function in the Carl Zeiss Jena Jenaval microscope is manufactured from a ZnAl alloy. Cast or injection-moulded ZnAl components made by Carl Zeiss Jena carry identification numbers that allow them to be identified. In the Jenaval microscope this number is 2643 (full marking: Si10 CZ 2643). The objective nosepiece holder used in the Jenalumar does not carry such a number.

Another useful piece of information is that the sliding fluorescence filter cube from the Carl Zeiss Jena Jenamed Fluorescence microscope fits the dovetail guide incorporated into this nosepiece holder.

The gallery includes photographs of the complete assembly consisting of the objective nosepiece and its holder for the Jenalumar microscope, making it clear how these two components are connected.

This database also contains, under item number 99678, the separate objective revolver without the holder.

Description of this part for the microscope.

The complete set presented here consists of three components:
1. a small metal plate marked with the numbers 1 to 8 – these identify the terminal positions
2. an electrical tab terminal strip with eight terminals, housed in a plastic body
3. the rear sheet-metal cover of the microscope arm with the printed 6V illumination wiring diagram

This set was removed from a Carl Zeiss Jena Jenalumar microscope.

Components "1" and "2" (the numbered plate and the electrical tab terminal strip) are universal and fit the following microscope models:
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenavert
- Carl Zeiss Jena Jenapol

Component "3" (the rear sheet-metal cover of the microscope arm)
- fits the Carl Zeiss Jena Jenalumar microscope
- does not fit the Carl Zeiss Jena Jenaval microscope
- I do not know whether it fits the Carl Zeiss Jena Jenavert or Jenapol microscopes, as I have not personally tested this.

The 6V supply wires coming from the power supply are connected to the input terminals on the underside of this electrical tab terminal strip. The power supply is built into the microscope base. The lampenhaus fitted with a 6V 25W halogen bulb is connected to the output terminals on the upper side. In the Carl Zeiss Jena Jenaval and Jenalumar microscopes this supplies the transmitted-light illuminator. In the Carl Zeiss Jena Jenavert microscope it supplies the reflected-light illuminator.

In microscope versions equipped with two illuminators, only one of them can be powered from the power supply built into the microscope base, because the built-in power supply has a maximum output power of 25 W. The second illuminator requires an external power supply appropriate for the particular light source (a halogen lamp, a fluorescence light source, or—in the case of LED illuminators—an LED power supply with a dimmer).

This database also contains, under item number 99694, the same component together with the rear sheet-metal cover of the microscope arm from a Carl Zeiss Jena Jenaval microscope. You can compare the two versions to see the difference in the size of the rear sheet-metal cover between the Carl Zeiss Jena Jenaval and Jenalumar models.

If you need only one component from this set—either the rear microscope arm cover or only the electrical tab terminal strip—please contact us by email or through social media.

Description of this part for the microscope.

It is not an illuminator holder in the literal sense. The illuminator is secured with screws to the sides of the microscope's vertical arm. Instead, the central circular opening in this component is designed to receive and accurately position the cylindrical light-output section of the illuminator (lamphouse).

Microscopes designed for reflected-light operation (either exclusively or in addition to transmitted light), such as the Carl Zeiss Jena Jenalumar, Jenavert and Jenapol-U, have a different upper horizontal microscope arm from models intended exclusively for transmitted light, such as the Carl Zeiss Jena Jenaval. The reflected-light arm includes a slot for filter sliders, a slot for an aperture slider and, of course, an angled mirror.

Interestingly, this component is also present in Carl Zeiss Jena Jenaval microscopes, even though the standard version of this model is not equipped with an EPI reflected-light illuminator. Since it is not used there, it is normally covered by the rear sheet-metal cover of the microscope arm. This is exactly why the rear cover of the Carl Zeiss Jena Jenalumar microscope is shorter than that of the Jenaval model—it does not have to cover this component (see item no. 99679 in this database).

This component fits the following microscope models:
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenavert
- Carl Zeiss Jena Jenapol

- in the Carl Zeiss Jena Jenaval microscope this component is hidden behind the rear sheet-metal cover and is not used
- in the Carl Zeiss Jena Jenalumar 50 this component receives the small 50W HBO fluorescence illuminator
- in the Carl Zeiss Jena Jenalumar 250 with the large integrated lamphouse, this component receives the light-output section of the 250W HBO fluorescence illuminator
- in the Carl Zeiss Jena Jenavert this component receives the 50W/100W halogen illuminator
- Carl Zeiss Jena Jenapol microscopes may be equipped with various EPI reflected-light illuminators

Cast or injection-moulded ZnAl components manufactured by Carl Zeiss Jena carry identification numbers that allow them to be identified. This component bears the number 2650 (full marking: Si10 2650).

Description of this part for the microscope.

Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- Carl Zeiss Jena Jenavert

The function of this microscope component is to reflect the light coming from the microscope base vertically upwards so that, after passing through the microscope slide with the specimen and the objective, it reaches the eyepieces and finally the user's eyes.

This component is a metal casting with a circular opening. The mirror is mounted in this opening. The complete assembly is fastened to the microscope base with screws.

Metal cast or injection-moulded microscope components manufactured by Carl Zeiss Jena carry identification numbers. The part to which the mirror is attached bears the number 2649 (full marking: Si10 CZ 2649).

Replacement of the right-angle mirror in Carl Zeiss Jena microscopes may be necessary in the following situations:
- if the mirror has become significantly scratched due to improper cleaning (minor scratches are usually not visible during normal use)
- if the reflective silver coating of the installed mirror has become oxidised
- if the mirror has been damaged, chipped or cracked, for example after becoming detached from its mount
- if the metal casting holding the mirror chips or breaks due to age, stresses caused by the mounting screw or mechanical damage

Description of this part for the microscope.

The complete set presented here consists of three components:
1. a small metal plate marked with the numbers 1 to 8 – these identify the terminal positions
2. an electrical tab terminal strip with eight terminals, housed in a plastic body
3. the rear sheet-metal cover of the microscope arm with the printed 6V illumination wiring diagram

This set was removed from a Carl Zeiss Jena Jenaval microscope.

Components "1" and "2" (the numbered plate and the electrical tab terminal strip) are universal and fit the following microscope models:
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenavert
- Carl Zeiss Jena Jenapol

Component "3" (the rear sheet-metal cover of the microscope arm)
- fits the Carl Zeiss Jena Jenaval microscope
- does not fit the Carl Zeiss Jena Jenalumar microscope
- I do not know whether it fits the Carl Zeiss Jena Jenavert or Jenapol microscopes, as I have not personally tested this.

The 6V supply wires coming from the power supply are connected to the input terminals on the underside of this electrical tab terminal strip. The power supply is built into the microscope base. The lampenhaus fitted with a 6V 25W halogen bulb is connected to the output terminals on the upper side. In the Carl Zeiss Jena Jenaval and Jenalumar microscopes this supplies the transmitted-light illuminator.

In microscope versions equipped with two illuminators, only one of them can be powered from the power supply built into the microscope base, because the built-in power supply has a maximum output power of 25 W. The second illuminator requires an external power supply appropriate for the particular light source (a halogen lamp, a fluorescence light source, or—in the case of LED illuminators—an LED power supply with a dimmer).

This database also contains, under item number 99679, the same component together with the rear sheet-metal cover of the microscope arm from a Carl Zeiss Jena Jenalumar microscope. You can compare the two versions to see the difference in the size of the rear sheet-metal cover between the Carl Zeiss Jena Jenaval and Jenalumar models.

If you need only one component from this set—either the rear microscope arm cover or only the electrical tab terminal strip—please contact us by email or through social media.

Description of this part for the microscope.

Jenapol
- Carl Zeiss Jena Jenalumar

This cover serves two main functions in the microscope:
- it protects the power supply and all electrical components built into the microscope base, protecting both the electrical system and the user from electric shock
- it protects the optical components located inside the microscope base from dust and other contamination

The base of Carl Zeiss Jena Jenaval, Jenalumar and similar microscopes contains part of the optical light path, and this area occasionally requires maintenance, especially cleaning. Since these microscopes are now more than 30 years old, it is not uncommon to find examples with this cover missing because it has been lost over the years.

Description of this part for the microscope.

Jena microscope models:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- can also be installed in a Carl Zeiss Jena Jenavert microscope to add transmitted-light capability

This component is located inside the microscope base. It receives the light beam from the illuminator, homogenises it (by diffusing the image of the lamp filament using a frosted filter acting as a diffuser) and then properly collimates it using a collimating lens. The prepared light beam then passes through another lens before reaching the right-angle mirror (sold as a separate component).

This part is well known on the secondary market among hobbyists and engineers building their own DIY optical projects, where it is frequently reused.

Interestingly, microscope versions intended exclusively for reflected-light operation (for example, the basic versions of the Carl Zeiss Jena Jenavert) do not contain this component because they do not have a transmitted-light optical path. However, both the microscope arm and the microscope base are identical to those used in transmitted-light models. This makes it possible to upgrade such an EPI microscope for transmitted-light operation by installing the complete lower transmitted-light optical path. The component offered here is one of the parts required for this conversion.

In the last photograph, an arrow indicates where this component is located inside the microscope, making it easy to identify.

Description of this part for the microscope.

Jena microscope models:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- Carl Zeiss Jena Jenavert

This component serves almost exclusively a cosmetic purpose. At both the top and bottom of the sheet-metal cover there are openings through which the long screws pass. These screws secure the transmitted-light lamp housing to the rear of the microscope body (at the bottom) or the reflected-light EPI lamp housing (at the top).

Each microscope has two of these sheet-metal covers—one on the left side and one on the right. Both are identical, so there is no difference between the left-hand and right-hand cover.

The cover is attached using ordinary adhesive and, after many years, it may simply come loose and fall off. These covers are also sometimes lost during repairs or maintenance, so older microscopes are often missing them. Reattaching an original cover is an easy way to restore the microscope to its original appearance.

In the last photograph, an arrow indicates where this component is located on the microscope, making it easy to identify.

Description of this part for the microscope.

models:
1. Carl Zeiss Jena Jenaval
2. Carl Zeiss Jena Jenalumar
3. Carl Zeiss Jena Jenapol
4. Carl Zeiss Jena Jenavert

1. In Carl Zeiss Jena Jenaval microscopes, this lamp house is used as the transmitted-light illuminator.

2a. In Carl Zeiss Jena Jenalumar 50 microscopes (equipped with the small HBO 50 fluorescent lamp house, identical to the one used in Carl Zeiss Jena Jenamed Fluorescence microscopes), this lamp house serves as the transmitted-light source.

2b. Carl Zeiss Jena Jenalumar 250 microscopes are equipped with a large integrated lamp house. The unit offered here is therefore not compatible with this model.

3. In Carl Zeiss Jena Jenapol microscopes, this halogen lamp house is used both for transmitted light (mounted underneath) and for reflected light (mounted on the top). However, some Jenapol versions are equipped only for transmitted-light operation or only for reflected-light operation.

4. Carl Zeiss Jena Jenavert microscopes are normally equipped with a different lamp housing for reflected light. However, when the original unit is missing, users often modify a lamp house like the one offered here for DIY projects. In addition, if a Jenavert is equipped with a transmitted-light optical path, this lamp house is used as its transmitted-light source.

The lamp house is attached to the microscope using two long screws. Unusually—and this often makes them difficult to find—the screws are removed FROM THE FRONT of the microscope. Their heads are accessible through openings in the white sheet-metal side covers of the microscope body. These covers with the screw openings are shown in this database under item number 99692.

This lamp house contains a filter wheel with four positions for 32 mm diameter round filters. It is fitted with the same filter configuration originally supplied by Carl Zeiss Jena for the Jenaval model:
- one position is empty
- Carl Zeiss Jena C312 blue filter
- Carl Zeiss Jena D282 grey filter
- Carl Zeiss Jena V231 green filter

The filter wheel is an optional part of this lamp house. The example offered here is fitted with it, but it can be removed and the illuminator will still function perfectly as a light source.

Cast or injection-moulded ZnAl components manufactured by Carl Zeiss Jena carry identification numbers. The housing of this lamp house bears the number 2670 (full marking: 2670 Si10 CZ).

In the last photograph, an arrow indicates where this component is located in the microscope, making it easy to identify.

Description of this part for the microscope.

transformer assembly installed inside the microscope base. It converts an input voltage of 110–240 V into a 6 V output with a maximum power of 25 W. It is intended to power a halogen lamp house. An example of this lamp house can be found in this database under item number 99693.

This is not the power supply for the 50W/100W reflected-light lamp housing used on the Carl Zeiss Jena Jenavert. It is also not the power supply for the fluorescent lamp houses used on the Carl Zeiss Jena Jenalumar.

Compatible with the following microscope models:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- Carl Zeiss Jena Jenavert

If you only need one component from this assembly—for example the transformer, one of the electronic circuit boards or just the potentiometer used to adjust the lamp brightness—please contact us by email or through our social media channels.

This complete assembly may be useful for solving the following microscope problems, among others:
- if the microscope illumination no longer works because of a faulty power supply. This may be caused by mains voltage surges, ageing electronic components or damage resulting from incorrect modifications (for example, conversion to LED lighting)
- if the illumination works but the brightness can no longer be adjusted because the potentiometer is worn out or defective

Originally, the complete power supply assembly (transformer, electronic circuit boards and wiring) is installed inside the microscope base, and it is offered here exactly in that configuration. How can it be used?
- the electrical components can be removed and used as spare parts to repair a damaged power supply
- the complete microscope base can be transplanted to another microscope (please note that it does not include any optical components)

An interesting DIY modification is to leave the power supply in the base offered here and then place the microscope on top of that base. This effectively raises the microscope while also providing an integrated power supply for a second lamp house.

Description of this part for the microscope.

microscope models:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- can also be installed in a Carl Zeiss Jena Jenavert microscope to add transmitted-light capability

This component is located inside the microscope base and enables the microscope illumination to be adjusted according to the Köhler illumination principle.

Interestingly, microscope versions intended exclusively for reflected-light operation (for example, the basic versions of the Carl Zeiss Jena Jenavert) do not include this transmitted-light field diaphragm because they do not have a transmitted-light optical path. However, the microscope base is identical to that used in transmitted-light models. This makes it possible to upgrade such an EPI microscope for transmitted-light operation by installing the complete lower transmitted-light optical path. The field diaphragm offered here is one of the components required for this conversion.

In the last photograph, an arrow indicates where the transmitted-light field diaphragm is located inside the microscope base, making this component easy to identify.

Description of this part for the microscope.

This filter is mounted in the sheet-metal housing of the large HBO 250W fluorescence illuminator. This illuminator is part of a large mirror light beam splitter used in Carl Zeiss Jena Jenalumar microscopes. The KG filter is designed to absorb heat (infrared radiation) emitted by the high-pressure HBO mercury lamp.

Please note that there is also a version of the Carl Zeiss Jena Jenalumar microscopes with a small 50W HBO illuminator. This KG filter glass was removed from a large 250W illuminator.

On the used market, in microscopy forums and in microscopy groups, several names are used for this filter, all referring to the same type of filter:
- KG filter / KG glass
- heat filter
- heat absorbing filter
- heat absorption filter
- heat-absorbing glass
- heat absorption glass
- absorption filter
- IR filter
- infrared blocking filter
- infrared cut filter
- KG3 heat absorption filter

This microscope element is highly susceptible to damage. When this happens, the filter needs to be replaced, for example with the filter presented here. Here are examples of damage that can occur during use of the fluorescence illuminator and reasons why replacement of the filter may be necessary:
- the KG filter may crack or become cloudy due to overheating
- the filter may also chip or break as a result of mechanical damage, for example during transport
- the filter may sometimes be damaged during improper maintenance

High-performance heat filters such as this KG filter used with a 250W lamp are very often used by people building their own DIY projects. The housing with screw mounting makes this particularly convenient.

The last photo in the gallery shows the housing of the HBO 250W illuminator (lampenhaus), with an arrow indicating which element is being described and where it is located inside the illuminator. This makes it possible to identify the element unambiguously.

Description of this part for the microscope.

susceptible to damage, and good and efficient passive cooling is very important in an HBO 250W illuminator.

In Carl Zeiss Jena Jenalumar microscopes, the large HBO 250W fluorescence illuminator is attached to the Spiegelhaus for light beam splitting. It has two such heat sinks – one at the bottom and one at the top of the lamp housing.

For certainty, the photo gallery shows the exact dimensions of this element. The last photo shows the complete illuminator from which this element was removed, allowing the compatibility to be confirmed with certainty.

Description of this part for the microscope.

fluorescence illuminator behind the high-pressure mercury burner. In Carl Zeiss Jena Jenalumar microscopes, the large HBO 250W fluorescence illuminator is attached to the Spiegelhaus for light beam splitting.

The function of this element is to collect and reflect toward the KG filter the light that "shines and escapes to the rear".

This mirror, located directly next to the light source, is susceptible to damage, among other things due to exposure to high temperatures. Additionally, when the high-pressure mercury burner explodes (which occasionally happens), the mirror is very often damaged by the explosion.

The photo gallery shows the exact dimensions of this element. The last photo shows the HBO 250W illuminator for a Carl Zeiss Jena Jenalumar microscope, allowing the compatibility to be confirmed with certainty.

Description of this part for the microscope.

here is not a standalone lamp housing (such as part number 99693 in this database). It is an internal component of the large, integrated illuminator used in Carl Zeiss Jena Jenalumar 250 microscopes.

Carl Zeiss Jena Jenalumar microscopes are available in two main versions:
1. with two small illuminators – with a separate 6 V 25 W halogen illuminator in a small housing (for transmitted light) and a separate HBO 50 W fluorescence illuminator in a small housing (for reflected light)
2. with a large, integrated module consisting of a mirror light splitter, an integrated transmitted-light module with a 6 V 25 W halogen lamp, and a large lamp housing for HBO 250 W fluorescence illumination

The component offered here is part of the second version of the Jenalumar microscope.

Basic parameters of this illuminator module:
Supported lamp: Narva HLWS 6 V 25 W halogen lamp
6 V power connection: this illuminator is connected to the distributor rail (see part number 99679 in this database)
Cooling: passive, in two ways. The Narva HLWS lamp has integrated cooling in the form of “wings”, while the entire illuminator is covered with a cover incorporating a finned heat sink (this is a separate component and is not part of the illuminator offered here)

The photo gallery shows the exact dimensions of this component. The last photo shows the complete HBO 250 W illuminator for the Carl Zeiss Jena Jenalumar microscope, with an arrow indicating this halogen illuminator module. This makes it possible to identify exactly where this component is located within the complete large microscope illuminator.