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.

numerical aperture.

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.

10x, 40x, and 100x

This phase contrast condenser can be used with microscopes from virtually any manufacturer as long as they have a 39.5 mm condenser mounting diameter (PZO, Zeiss, Will Wetzlar, and dozens of others).
This high-quality phase contrast condenser was manufactured in Japan before the company was acquired by the Chinese company Motic.

Description of this part for the microscope.

condenser lens can be unscrewed, creating a condenser with a low numerical aperture, providing an ideal image when working with low-power objectives.

The dovetail on the bottom has a notch, most likely for a spring-loaded mounting screw, which should be located in the condenser holder.

Description of this part for the microscope.

polarized transmitted light with the possibility of use as a brightfield condenser
Mounting: the condenser is permanently integrated with a dovetail mount
Top lens: flip-out system allowing the upper lens to be moved into or out of the optical path to change the numerical aperture
Iris diaphragm: yes
Diffuser: yes, with the possibility of moving it into or out of the optical path
Polarizer: yes, rotatable, with the possibility of moving it into or out of the optical path

This condenser fits the following Carl Zeiss Jena microscope models:
- Polmi-A
- Nf
- Ng
- Nu / Nu2

Note: despite the visual similarity of the mounting interface, this condenser does NOT fit the Carl Zeiss Jena Lu microscope.

Important: the condenser is permanently integrated with the dovetail mount and cannot be used with other microscopes without significant modifications.

Description of this part for the microscope.

inserted.

This is an element for repair of a microscope condenser by Carl Zeiss Jena, model Abbe 1.2.
Please note that this is an element (component) for a microscope part (condenser), not for a specific microscope model.

The handle in this ring breaks very frequently, and then the iris diaphragm cannot be opened or closed and the condenser loses its functionality. In such a case, instead of replacing the entire condenser, it is enough to replace only this element - that is, to repair the condenser (recommendation: always repair - never throw away).

Note - over the years Carl Zeiss Jena produced the Abbe 1.2 condenser in different versions, and this ring is available in at least two variants:
- ring with a thickness of 2.5 mm and a handle width of 6 mm
- ring with a thickness of 2 mm and a handle width of 3.5 mm

Here I present and offer a ring with a thickness of 2.5 mm and a handle width of 6 mm. Be sure to check whether this is exactly the ring you need.

Description of this part for the microscope.

are inserted.

This is an element for repair of a microscope condenser by Carl Zeiss Jena, model Abbe 1.2.
Please note that this is an element (component) for a microscope part (condenser), not for a specific microscope model.

The handle in this ring breaks very frequently, and then the iris diaphragm cannot be opened or closed and the condenser loses its functionality. In such a case, instead of replacing the entire condenser, it is enough to replace only this element - that is, to repair the condenser (recommendation: always repair - never throw away).

Note - over the years Carl Zeiss Jena produced the Abbe 1.2 condenser in different versions, and this ring is available in at least two variants:
- ring with a thickness of 2.5 mm and a handle width of 6 mm
- ring with a thickness of 2 mm and a handle width of 3.5 mm

Here I present and offer a ring with a thickness of 2 mm and a handle width of 3,5 mm. Be sure to check whether this is exactly the ring you need.

Description of this part for the microscope.

repair or upgrade of a microscope condenser by Carl Zeiss Jena, model Abbe 1.2.
Please note that this is an element (component) for a microscope part (condenser), not for a specific microscope model.

The Carl Zeiss Jena Abbe 1.2 condenser is available in the following versions:
- with a wide-field lens mounted at the bottom of the condenser, below the filter holder
- with a filter holder only, without a wide-field lens

With this lens, you can upgrade your condenser if it is not equipped with one.

Description of this part for the microscope.

model Abbe 1.2.
Please note that this is an element (a subcomponent) for a microscope part (the condenser) and not for a specific microscope model.

Description of this part for the microscope.

element (component) for a microscope part (condenser), not for a specific microscope model.

Description of this part for the microscope.

yes

This condenser fits microscopes from many manufacturers (e.g. Steindorff Berlin, Zeiss, Carl Zeiss Jena, Leitz, Kremp Wetzlar, Will Wetzlar and many others) with a condenser holder diameter of 39.5 mm.

Description of this part for the microscope.

40
Mounting diameter: 39.5 mm
Iris diaphragm: yes
Filter holder: yes, for round filters with 32 mm diameter
Removable top lens: yes

This is a very rarely encountered condenser designed for use with high numerical aperture objectives (e.g. Nikon Plan Apo or Leitz PL-Fluotar Oel Fluoreszenz).

This condenser fits microscopes from many manufacturers (e.g. PZO, Zeiss, Carl Zeiss Jena, Leitz, Kremp Wetzlar, Will Wetzlar and many others) with a condenser holder diameter of 39.5 mm.

Description of this part for the microscope.

condenser fits microscopes from many manufacturers (e.g. Lomo, Carl Zeiss Jena, Olympus and many others) with a condenser holder diameter of 37 mm.

Description of this part for the microscope.

microscope. It will most likely also fit other models from the Jenamed series (e.g. Jenamed Variant, Jenamed Fluorescence, Jenamed-2, Jenamed Hematology). Please note however that the Carl Zeiss Jena Jenamed Histology microscope is factory-equipped with a different type of condenser - the "flip-out" type.

To make sure whether this condenser will fit a specific Carl Zeiss Jena microscope from the Jenamed series, it is best to carefully check all dimensions based on the gallery photos or ask a question on a professional forum, e.g. https://www.mikroskopie-forum.de/

Mechanically, this condenser is mounted from the underside of the microscope stage - first it is screwed into the threaded opening in the stage and then secured with three screws. The upper lens can be unscrewed to obtain a condenser with a lower numerical aperture N.A. This condenser does not have an iris diaphragm installed because in Jenamed microscopes it is a separate element.

Replacing the condenser in a Carl Zeiss Jena Jenamed microscope may be necessary:
- when the upper lens becomes damaged, for example when it turns matte due to exposure to various chemical reagents
- when the upper lens becomes damaged due to rubbing. Surprisingly, this unusual type of damage is very common after several decades of microscope use.

In the last photo I indicate with an arrow exactly which element it is and where it is located in the microscope.

Description of this part for the microscope.

therefore cannot be used in:
- Jenamed Cytology
- Jenamed Variant
- Jenamed Hematology
- Jenamed Fluorescence
- Jenamed-2

Mechanically, this condenser is a "flip-out" design and is mounted in a metal frame together with a lever used to rotate it in order to obtain one of two operating modes: low or high numerical aperture N.A. This lever extends outside the microscope housing so that the user can operate it.

The complete module is mounted underneath the microscope stage by attaching the entire condenser assembly from below with four screws. This condenser does not contain an iris diaphragm because, in Jenamed microscopes, it is a separate component mounted beneath the condenser.

In the Carl Zeiss Jena Jenamed Histology microscope, this condenser is not used together with the wide-field lens that is installed beneath the condenser in other Jenamed models (part Si10 CZ 2711-1). In the Jenamed Histology model, a polarizer is installed in this position instead.

Replacement of the condenser in a Carl Zeiss Jena Jenamed Histology microscope may be necessary:
- when the upper lens becomes damaged, for example by becoming cloudy due to exposure to various chemical reagents
- when the upper lens is damaged by friction. Surprisingly, this unusual type of damage is very common after several decades of microscope use
- when the mechanical lens switching mechanism ("flip-out") becomes damaged

Metal cast or injection-moulded microscope parts manufactured by Carl Zeiss Jena carry their own part numbers. This condenser module bears number 2713 (full marking: Si10 CZ 2713).

In the last photograph, I indicate with an arrow exactly which component is being offered and where it is located within the microscope.

Description of this part for the microscope.

2 Fluorescence

It DOES NOT FIT Carl Zeiss Jena microscopes from the Jenamed series and therefore cannot be used in:
- Jenamed Cytology
- Jenamed Variant
- Jenamed Hematology
- Jenamed Histology

Mechanically, this condenser is mounted on the microscope stage support plate (stage support). The microscope stage is installed onto this support plate together with the condenser. The upper condenser lens can be unscrewed - after removing it, the condenser operates with a lower numerical aperture N.A.

This condenser does not contain an iris diaphragm because, in Jenamed microscopes, it is a separate component mounted beneath the condenser.

Replacement of the condenser in a Carl Zeiss Jena Jenamed-2 microscope may be necessary:
- when the upper lens becomes damaged, for example by becoming cloudy due to exposure to various chemical reagents (common in fluorescence applications)
- when the upper lens is damaged by friction. Surprisingly, this unusual type of damage is very common after several decades of microscope use

Metal cast or injection-moulded microscope parts manufactured by Carl Zeiss Jena carry their own part numbers. The microscope stage support plate on which the condenser is mounted bears number 3030 (full marking: Si10 CZ 3030).

In the last photograph, I indicate with an arrow exactly which component is being offered and where it is located within the microscope.

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.

bright field
- dark field
- oblique illumination
- phase contrast

It can work with phase objectives of different magnifications and from different manufacturers (it is sufficient to manually adjust the ring diameter).

Basic parameters:
Manufacturer: Leitz Wetzlar
Model: Heine condenser
Mounting diameter: 39.5 mm
Numerical aperture N.A.: variable, up to 1.4

This Heine condenser was designed for microscopes with a condenser holder in the form of a circular clamp (e.g. Leitz SM microscopes). It is not a condenser that slides into mounting rails (as found, for example, in the Leitz Orthoplan microscope).

This condenser fits microscopes from many manufacturers (e.g. PZO, Steindorff Berlin, Zeiss, Carl Zeiss Jena, Leitz, Kremp Wetzlar, Will Wetzlar and many others) equipped with a 39.5 mm condenser holder.

Description of this part for the microscope.

3
Numerical aperture N.A.: variable, from N.A. 0.16 to N.A. 1.4
Aperture diaphragm: no
Compatible microscope: Carl Zeiss Jena Lumipan

Mechanically, this condenser is mounted on a dovetail guide located beneath the microscope stage.

Several important notes:
- this pancratic condenser is compatible only with the Carl Zeiss Jena Lumipan microscope
- this condenser is not compatible with the Carl Zeiss Jena Nf or Carl Zeiss Jena Nu / Nu2 microscopes, even though the condenser used in those models is very similar
- this condenser does not include an iris diaphragm because the Carl Zeiss Jena Lumipan microscope has its aperture diaphragm located in the microscope base, directly below the condenser

In the last photograph, an arrow indicates which component is being described and where it is located in the microscope, making it easy to identify this part. In addition, the attached video shows how the individual components of this condenser move.

This condenser is often used as a "donor of parts" for 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 dark-field lens is very often used to build a custom cardioid condenser

Description of this part for the microscope.

Zeiss Jena
Model: Apl 1.4
Holder name according to the manufacturer's catalogue: Kondensor-Einhänger mo
Condenser name according to the manufacturer's catalogue: Aplanatischer Kondensor 1.4 mo / ms
Version: grey version from a Carl Zeiss Jena Ergaval microscope (as opposed to the black version used, for example, on Carl Zeiss Jena Nf microscopes)
Numerical aperture N.A.: 1.4
Aperture diaphragm: yes, mounted in the condenser holder
Wide-field lens: yes, swing-out type
Removable top lens: yes, unscrewable
Mounting diameter: the optical section (the condenser without the iris diaphragm) has a mounting diameter of 39.5 mm and can be unscrewed from the condenser holder

The complete assembly consists of the following components:
- upper Apl 1.4 lens
- removable condenser (mo / ms)
- iris diaphragm attached to the condenser holder
- condenser holder mo
- swing-out wide-field lens
- two centring screws

The last photograph in the gallery shows a page from the manufacturer's original catalogue. Arrows indicate both this exact condenser holder model and the matching condenser.

Mechanically, this condenser is mounted using a dovetail guide located beneath the microscope stage. On the Carl Zeiss Jena Ergaval this is a separate condenser mounting assembly, while on the Carl Zeiss Jena Amplival the dovetail is integrated into the microscope stage support assembly.

Description of this part for the microscope.

meters:
Manufacturer: Carl Zeiss Jena
Designation: Apl. 1,4
Name of the mount according to the manufacturer's catalogue: Kondensoreinhänger mfl 2, Bestellnummer 301080:021.26/0
Name of the condenser according to the manufacturer's catalogue: Aplanatischer Kondensor 1.4 mo / ms (applies only to the upper optical part)
Name of the condenser according to the manufacturer's catalogue: Kondensor hoher Lichtstärke mit Vorschaltsystem (applies to the entire module)
Version: grey colour with a black upper lens. Variant with a "dot" in the name after "Apl"
Numerical aperture N.A.: 1.4
Aperture diaphragm: yes, attached to the condenser mount
Wide-field lens: yes, it can be swung out of the optical path. This is the version with the large lens in a housing (see description below)
Removable upper lens: yes, it can be rotated
Mounting diameter: the optical part (condenser without diaphragm) has a mounting diameter of 39.5 mm and can be unscrewed from the condenser mount
Operating modes: the condenser can be used both as a dry condenser and as an immersion condenser

The entire part consists of the following elements:
- upper Apl. 1,4 lens
- screw-on/removable condenser (mo / ms)
- iris diaphragm screwed onto the condenser mount
- condenser mount model mfl 2
- swing-out wide-field lens
- two centering screws

This condenser is mainly used in Carl Zeiss Jena Fluoval / Fluoval-2 fluorescence microscopes. It is optimal for use with high-numerical-aperture apochromatic microscope objectives. For precisely this reason, users often install it on Carl Zeiss Jena Ergaval and Carl Zeiss Jena Amplival microscopes equipped with apochromatic objectives (Carl Zeiss Jena Apochromat).

It is worth mentioning again that this condenser can be used in two modes:
- without immersion oil on the upper lens of the condenser. In this case, it operates as a "dry condenser" and its numerical aperture N.A. is 0.9.
- with immersion oil on the upper lens of the condenser (i.e. underneath the microscope slide). In this case, it operates as an "immersion condenser" and its numerical aperture N.A. is 1.4, allowing a very bright image to be obtained - this is important in fluorescence microscopy or when using high-N.A. immersion objectives.

During production, this condenser was available in several versions:
- with a black upper lens, a dot in the model name (Apl. 1,4) and a wide-field module consisting of a single lens
- with a black upper lens, without a dot in the model name (Apl 1,4) and a single wide-field module consisting of several lenses (including one with a very small diameter)
- with a grey upper lens marked Apl 1,4mo2 and a single wide-field module consisting of several lenses (including one with a very small diameter)
- with a grey upper lens marked Apl 1,4mo2 and a wide-field module consisting of two independently swing-out lenses, each on its own mount

I have not found any information anywhere as to whether the above-mentioned versions differ in their operation. From experience, I know that they are used interchangeably - but I do not know whether any differences in operation can actually be noticed.

Mechanically, this condenser is mounted on dovetail rails located underneath the microscope stage. In Carl Zeiss Jena Ergaval microscopes, this is a separate condenser mounting block, whereas in Carl Zeiss Jena Fluoval / Amplival microscopes, the dovetail is located on the microscope stage holder block.

The manufacturer describes this condenser as follows: "High-intensity condenser with an auxiliary system for illuminating large fields while imaging the field diaphragm. [...] The condenser of the FLUOVAL 2 can be used as a dry and immersion condenser of the highest aperture to achieve the highest possible excitation intensity. It is equipped with a switchable wide-field system that illuminates the large fields of low-power objectives while providing a sharp image of the field diaphragm in the object plane."

Description of this part for the microscope.

meters:
Manufacturer: Carl Zeiss Jena
Designation: Apl. 1,4
Name of the mount according to the manufacturer's catalogue: Kondensoreinhänger mfl 2, Bestellnummer 301080:021.26/0
Name of the condenser according to the manufacturer's catalogue: Aplanatischer Kondensor 1.4 mo / ms (applies only to the upper optical part)
Name of the condenser according to the manufacturer's catalogue: Kondensor hoher Lichtstärke mit Vorschaltsystem (applies to the entire module)
Version: grey colour with a black upper lens. Variant without the "dot" in the name after "Apl"
Numerical aperture N.A.: 1.4
Aperture diaphragm: yes, attached to the condenser mount
Wide-field lens: yes, it can be swung out of the optical path. This is the version with the large lens in a housing (see description below)
Removable upper lens: yes, it can be rotated
Mounting diameter: the optical part (condenser without diaphragm) has a mounting diameter of 39.5 mm and can be unscrewed from the condenser mount
Operating modes: the condenser can be used both as a dry condenser and as an immersion condenser

The entire part consists of the following elements:
- upper Apl 1,4 lens
- screw-on/removable condenser (mo / ms)
- iris diaphragm screwed onto the condenser mount
- condenser mount model mfl 2
- swing-out wide-field lens
- two centering screws

This condenser is mainly used in Carl Zeiss Jena Fluoval / Fluoval-2 fluorescence microscopes. It is optimal for use with high-numerical-aperture apochromatic microscope objectives. For precisely this reason, users often install it on Carl Zeiss Jena Ergaval and Carl Zeiss Jena Amplival microscopes equipped with apochromatic objectives (Carl Zeiss Jena Apochromat).

It is worth mentioning again that this condenser can be used in two modes:
- without immersion oil on the upper lens of the condenser. In this case, it operates as a "dry condenser" and its numerical aperture N.A. is 0.9.
- with immersion oil on the upper lens of the condenser (i.e. underneath the microscope slide). In this case, it operates as an "immersion condenser" and its numerical aperture N.A. is 1.4, allowing a very bright image to be obtained - this is important in fluorescence microscopy or when using high-N.A. immersion objectives.

During production, this condenser was available in several versions:
- with a black upper lens, a dot in the model name (Apl. 1,4) and a wide-field module consisting of a single lens
- with a black upper lens, without a dot in the model name (Apl 1,4) and a single wide-field module consisting of several lenses (including one with a very small diameter)
- with a grey upper lens marked Apl 1,4mo2 and a single wide-field module consisting of several lenses (including one with a very small diameter)
- with a grey upper lens marked Apl 1,4mo2 and a wide-field module consisting of two independently swing-out lenses, each on its own mount

I have not found any information anywhere as to whether the above-mentioned versions differ in their operation. From experience, I know that they are used interchangeably - but I do not know whether any differences in operation can actually be noticed.

Mechanically, this condenser is mounted on dovetail rails located underneath the microscope stage. In Carl Zeiss Jena Ergaval microscopes, this is a separate condenser mounting block, whereas in Carl Zeiss Jena Fluoval / Amplival microscopes, the dovetail is located on the microscope stage holder block.

The manufacturer describes this condenser as follows: "High-intensity condenser with an auxiliary system for illuminating large fields while imaging the field diaphragm. [...] The condenser of the FLUOVAL 2 can be used as a dry and immersion condenser of the highest aperture to achieve the highest possible excitation intensity. It is equipped with a switchable wide-field system that illuminates the large fields of low-power objectives while providing a sharp image of the field diaphragm in the object plane."

Description of this part for the microscope.

without lenses used for? When working with low power objectives (roughly up to 10x - 12.5x), a better image is obtained
- either without any condenser
- or with an iris diaphragm only
- or with a special condenser of very low numerical aperture N.A.
This solution is very often used in inverted biological microscopes - and that is exactly how the condenser shown here was used.

If this were a complete condenser with optics (which it is not), the Zeiss microscope condenser P/N 465267 (also written as 46 52 67) could be fitted with N.A. 0.32 top lenses, with DIC or polarization top lenses N.A. Apl. 0.63, or with others, because the top lens is an interchangeable element screwed into the condenser housing.

The item shown here can be described as:
- a Zeiss condenser housing
- a Zeiss iris diaphragm in a housing
- also (although not correctly) a condenser with N.A. of about 0.20
However, since this is not a damaged item, it has the thread into which a condenser top lens can be screwed.

In Carl Zeiss microscopes of the Standard series (except the Standard Junior school model), the condenser is not mounted in a round holder. It has a ring-shaped dovetail that slides into the dovetail guide of the condenser carrier.

The last photo in the gallery shows the Carl Zeiss ICM 405 inverted microscope, with an arrow indicating exactly where this particular condenser was mounted.

The Zeiss 465267 condenser has a mount in the form of a dovetail ring. This mounting interface is used, among others (this is not a complete list), in the following microscope models:
- Zeiss Standard 14 / 16 / 18 / GFL
- Zeiss Standard WL / WL 89
- Zeiss Standard 20 / 25 / 25 ICS
- Zeiss Universal
- Zeiss Photomicroscope I / II / III RS
- Zeiss Ultraphot
- Zeiss IM 35 / ICM 405 inverted microscopes

The mounting ring of the condenser shown here has a diameter of 41.6 mm. The ring also has a factory-made conical notch that fits the locking pin fixing the position of the condenser. This pin is located in the condenser carrier.

Note on the mounting diameter: over nearly 50 years of production of microscopes of this series, the dovetail diameter was always about 42 mm - but it was not perfectly constant. Depending on the year of production, the material (plastic, aluminium, brass) and the type of condenser (classic Abbe or phase contrast turret condenser), it can range from slightly above 41 mm to almost 43 mm. Such a large tolerance results from the design of the condenser carrier: it has return springs, a locking pin and clamping / centering screws. Thanks to this, condensers with a mounting ring diameter of 41 to 43 mm can almost always be mounted stably.

Description of this part for the microscope.

a low-power survey condenser with low numerical aperture and a main condenser with high aperture. Both sit on a common carrier at the same time, which lets you switch between them. What I am offering here is the condenser alone, so without the carrier.

Parameters of this condenser:
Manufacturer: Carl Zeiss Jena
Numerical aperture N.A.: 0.12
Correction: aplanatic
Mounting: the condenser screws into a dedicated carrier. The thread diameter is 36 mm.
Iris diaphragm: yes, the condenser has a ring that opens and closes the diaphragm
Removable top lens: no
Intended use: this condenser model was fitted in Carl Zeiss Jena Jenaval microscopes

This condenser can also be screwed into the carrier of Carl Zeiss Jena Jenalumar microscopes - it is the same carrier as in Jenaval microscopes. Note, however, that Jenalumar microscopes came with a 0.20 N.A. condenser as standard (you can see it here: https://www.microscopeparts.eu/part/00530).

A condenser with such a low numerical aperture is intended for observation with low magnification microscope objectives (1.25x / 3.2x / 6.3x, 10x at most).

Description of this part for the microscope.

a survey condenser with low numerical aperture and a main condenser with high aperture. Both sit on a common carrier at the same time, which lets you switch between them. What I am showing here is the main one, with the 0.9 aperture - the condenser alone, so without the carrier.

Parameters of this condenser:
Manufacturer: Carl Zeiss Jena
Numerical aperture N.A.: 0.9
Correction: achromatic-aplanatic (Achr. apl.)
Immersion: no. This is a dry condenser
Mounting: the condenser carrier holds a centrable threaded ring, and the condenser screws into that ring. The thread diameter is 38 mm.
Iris diaphragm: not on the condenser - the diaphragm sits in the carrier, below the condenser
Intended use: this condenser model was fitted in Carl Zeiss Jena Jenaval microscopes

How it mounts in the carrier:
- The condenser carrier holds a threaded ring, and the ring itself is centrable - two centring screws do that job (these ones: https://www.microscopeparts.eu/part/00535).
- The screws set the position of the ring, and the condenser simply screws into that ring.
- Further down, in the same carrier, sits the iris diaphragm for this main condenser. It is centrable as well and has its own screws for that.

This condenser can also be screwed into the carrier of Carl Zeiss Jena Jenalumar microscopes - it is the same carrier as in Jenaval microscopes. Note, however, that Jenalumar microscopes run the Apl. 0.9 condenser from the factory, that is the aplanatic version without achromatic correction.

The Achr. apl. 0.9 condenser is the working condenser of these microscopes - it covers the whole range of dry objectives, but with immersion objectives it works without making use of their full aperture.