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Description of this part for the microscope.

10
Cover glass: not required
Thread: RMS
Tube length: 160 mm
Focal length: 37 mm
Immersion: no (dry objective)
Thread: RMS

This objective can be used both:
- with biological microscopes operating with transmitted light
- with inverted microscopes
- with microscopes equipped with reflected-light illumination
- for macro photography by directly attaching it to a camera

This is a version of the objective with the markings engraved on the housing rather than merely applied with paint (printed). This is important in terms of the durability of the markings - printed markings (without engraving) very often wear off, in which case the objective parameters are no longer visible.

The companies Eschenbach, Kremp Wetzlar, CBS Beck Kassel, Kosmos Stuttgart and Hund Wetzlar also used objectives manufactured by Will Wetzlar, although their own manufacturer name was often printed on the objectives. It can therefore be said with a high degree of confidence that this objective will fit microscopes from these companies - but it is worth checking the parfocal length first (37 mm or 45 mm).

This objective fits practically any microscope from any manufacturer, provided that it has an RMS thread and supports objectives designed for TL = 160 mm and with a parfocal length of 37 mm. Several examples of such microscopes are listed in the "compatibility" section, but this is not a complete list.

Description of this part for the microscope.

25
Cover glass: not required
Thread: RMS
Tube length: 160 mm
Focal length: 37 mm
Immersion: no (dry objective)
Thread: RMS

This objective can be used both:
- with biological microscopes operating with transmitted light
- with inverted microscopes
- with microscopes equipped with reflected-light illumination
- for macro photography by directly attaching it to a camera

This is a version of the objective with the markings engraved on the housing rather than merely applied with paint (printed). This is important in terms of the durability of the markings - printed markings (without engraving) very often wear off, in which case the objective parameters are no longer visible.

The companies Eschenbach, Kremp Wetzlar, CBS Beck Kassel, Kosmos Stuttgart and Hund Wetzlar also used objectives manufactured by Will Wetzlar, although their own manufacturer name was often printed on the objectives. It can therefore be said with a high degree of confidence that this objective will fit microscopes from these companies - but it is worth checking the parfocal length first (37 mm or 45 mm).

This objective fits practically any microscope from any manufacturer, provided that it has an RMS thread and supports objectives designed for TL = 160 mm and with a parfocal length of 37 mm. Several examples of such microscopes are listed in the "compatibility" section, but this is not a complete list.

Description of this part for the microscope.

65
Cover glass: yes, 0.17 mm
Thread: RMS
Tube length: 160 mm
Focal length: 37 mm
Immersion: no (dry objective)
Thread: RMS

This is a version of the objective with the markings engraved on the housing rather than merely applied with paint (printed). This is important in terms of the durability of the markings - printed markings (without engraving) very often wear off, in which case the objective parameters are no longer visible.

The companies Eschenbach, Kremp Wetzlar, CBS Beck Kassel, Kosmos Stuttgart and Hund Wetzlar also used objectives manufactured by Will Wetzlar, although their own manufacturer name was often printed on the objectives. It can therefore be said with a high degree of confidence that this objective will fit microscopes from these companies - but it is worth checking the parfocal length first (37 mm or 45 mm).

This objective fits practically any microscope from any manufacturer, provided that it has an RMS thread and supports objectives designed for TL = 160 mm and with a parfocal length of 37 mm. Several examples of such microscopes are listed in the "compatibility" section, but this is not a complete list.

Description of this part for the microscope.

objective, and its technical specifications are described below. However, this particular example may be of interest to collectors of microscope equipment.

The objective is designed for a tube length (TL) of 160 mm and corrected for use with a 0.17 mm thick cover glass. The engraving on the objective barrel should therefore read:

160/0.17

but the metal barrel is engraved:

0/0.17 - meaning the two leading digits, "1" and "6", are missing.

This is not a painted marking that has worn off, which is very common. It is a machine engraving that was defective straight from the factory.

Manufacturer: Will Wetzlar
Magnification: 100x
Model: 160/0.17 Oel 100/1.25
Actual engraving: 0/0.17 Oel 100/1.25
Type of error: incomplete engraving of the specifications on the barrel
Numerical aperture N.A.: 1.25
Cover glass: yes, 0.17 mm
Thread: RMS
Tube length: 160 mm
Parfocal length: 37 mm
Immersion: yes, oil

Eschenbach, Kremp Wetzlar, CBS Beck Kassel, Kosmos Stuttgart and Hund Wetzlar also used objectives made by Will Wetzlar, although these often carried their own brand name. It is therefore quite safe to say that this objective will fit microscopes from these companies - but it is worth checking the parfocal length first (37 mm or 45 mm).

This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL=160 mm and a parfocal length of 37 mm. Some example microscopes are listed in the "compatibility" section, but the list is not exhaustive.