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.

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.

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.

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.

These screws fit the following Carl Zeiss Jena microscopes:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- Carl Zeiss Jena Jenavert

The so-called "small illuminators", that is the halogen 25W one (like this: https://www.microscopeparts.eu/gallery/99693) or the HBO 50W, are held by two such screws. Large HBO 250W illuminators with an integrated power supply are mounted on 4 such screws.

If your microscope has only one small illuminator (for example a Jenaval with transmitted light or a Jenavert with EPI illumination), you can extend it with a second (also small) illuminator. You will then need two screws for that.

What is unusual (and sometimes the reason why a user cannot find these screws for a long time) is that they are unscrewed FROM THE FRONT of the microscope. The heads of these screws sit in openings cut into the white sheet-metal side covers of the microscope. You can see these covers with the screw openings here: https://www.microscopeparts.eu/gallery/99692.