Carl Zeiss Jena Nf / NU microscope oblique illumination sliding iris diaphragm - photo gallery

This is description of this part:

Iris diaphragm module for Carl Zeiss Jena Nf, NU and NU-2 microscopes.

In the following microscopes:
- Carl Zeiss Jena Nf
- Carl Zeiss Jena NU and NU-2

this module serves as the aperture diaphragm. The field diaphragm is built into the illumination path inside the microscope base.

At the same time, it provides a holder for 32 mm round filters. The video available in the gallery also demonstrates how a filter is inserted into this holder.

The sliding iris diaphragm mounted beneath the microscope condenser allows oblique illumination to be set, producing a three-dimensional image with enhanced contrast of transparent specimens (such as unstained cells). The resulting image is similar to differential interference contrast (DIC).

This component is known under various names, including:
- decenterable iris diaphragm
- decentering aperture diaphragm
- off-axis iris diaphragm
- eccentric iris diaphragm
- sliding iris diaphragm
- sliding iris
- oblique illumination condenser
- condenser with sliding iris
- oblique illumination module
- oblique illumination diaphragm
- offset iris
- Poor Man's DIC device

Note — this diaphragm DOES NOT FIT the Carl Zeiss Jena Lumipan microscope, even though it appears very similar at first glance.

Because this module is removable, it is missing from a large proportion of microscopes available on the second-hand market. During decades of use, these diaphragm modules were frequently lost.

In addition, they are often damaged and need replacement. The most common failures include:
- the protective glass covering the diaphragm becomes scratched or broken
- the diaphragm blades become bent or broken
- the screw used to decenter the diaphragm bends or breaks
- the return spring responsible for restoring the diaphragm to its centred position becomes damaged or is missing

Replacing the damaged assembly with the diaphragm module offered here solves these problems.

What is this part needed for?

• if this component is missing from your Carl Zeiss Jena microscope
• if you already have such an iris diaphragm but it is damaged and needs replacement

What category does this part belong to?

Iris diaphragms [ link ] [More Iris diaphragms]

Who manufactures this part?

• Carl Zeiss Jena - VEB Carl Zeiss Jena DDR (former East Germany) [ link ] [More Carl Zeiss Jena]
• ausJena
• aus Jena

What microscope does this part come from?

Mikroskop Carl Zeiss Jena Nf [ link ] [More from Nf]

What microscopes or components is this part compatible with?

• Carl Zeiss Jena Nf
• Carl Zeiss Jena NfPk
• Carl Zeiss Jena NU
• Carl Zeiss Jena NU-2

Names, descriptions, terms, and search contexts under which this part is searched.

• Carl Zeiss Jena Nf microscope repair parts
• Carl Zeiss Jena Nf / Nu microscope iris diaphragm
• Carl Zeiss Jena Nf / Nu Mikroskop Irisblende
• Carl Zeiss Jena buy spare parts