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Description of this part for the microscope.

Zeiss
Magnification: 40x
Correction: plan achromatic
Engraving on the objective: Primo Plan-ACHROMAT 40x/0,65 ∞/0,17 415500-1602
Numerical aperture N.A.: 0.65
Working distance WD: 0.61 mm
Manufacturer catalog number: 415500-1602
Tube length: infinity
Cover glass: yes, 0.17 mm thick
Immersion: no (dry objective)
Thread: RMS

This objective works properly only with the Zeiss Primostar line. It does not work properly with other Zeiss microscopes, even if they also have an RMS thread and are infinity corrected.

NOTE: many sources state that the Zeiss objective P/N 415500-1611-001 is the successor of this objective. This is not true. In fact, Zeiss 415500-1611-001 is a 40x objective designed for use without a cover glass, mainly for reflected-light (EPI) work.

Description of this part for the microscope.

objective:
Manufacturer: Zeiss
Magnification: 4x
Correction: plan achromatic
Engraving on the objective: Primo Plan-ACHROMAT 4x/0,10 ∞/- 415500-1600
Numerical aperture N.A.: 0.10
Working distance WD: 12.0 mm
Manufacturer catalog number: 415500-1600
Tube length: infinity
Cover glass: irrelevant - objectives with such low magnification work both with and without a cover glass
Immersion: no (dry objective)
Thread: RMS

This objective works properly only with the Zeiss Primo line (Primostar / Primovert microscopes). It does not work properly with other Zeiss microscopes, even if they also have an RMS thread and are infinity corrected. It is also suitable for reflected-light (EPI) work.

For the microscope models of the Zeiss Primo line, both the one-word names (Zeiss Primostar and Zeiss Primovert) and the two-word names (Zeiss Primo Star and Zeiss Primo Vert) are commonly used.

Description of this part for the microscope.

so additional optics in the form of a tube lens are needed to create the intermediate image. In this case it has to be a lens with a focal length of 180 mm, the same as in the Motic CCIS system - and unlike the Zeiss ICS system (also infinity, used among others in the Axio series microscopes), whose tube lens has a focal length of 164.5 mm.

This lens was removed from the Zeiss 415500-1400-000 binocular head, but it also fits the model with a built-in digital camera and the model with a trino port (phototube). So it fits:
- the Zeiss 415500-1400-000 binocular head
- the Zeiss 415500-1401-000 binocular head with trinocular phototube
- the Zeiss 415500-1402-000 binocular head with built-in digital camera

In the Primostar series the tube lens is placed in the two-part microscope head. This head consists of the angled tube and the eyepiece head screwed onto it. The tube lens sits in the lower part of the tube, at the joint with the microscope body, inside the ring dovetail.