This is description of this part:
PZO Poland microscope objective with 40x magnification, 170 mm tube length and 33 mm focal length (the so-called short version).
Basic parameters of this PZO microscope objective:
Manufacturer: PZO Poland
Model: 40/0.65 170/0.17
Magnification: 40x
Correction: Achromat
Numerical aperture: 0.65
Tube length: 170 mm (very rare in PZO)
Focal length: 33 mm
Cover glass: yes, 0.17 mm thickness
Immersion: no (dry objective)
Thread: RMS
Please note that this objective was designed for microscopes with a 170 mm tube length. This refers to older PZO microscope models:
- PZO MinO
- PZO M100
- PZO ML1 / ML2 and ML3
- PZO MB1 and MB2
- however, this is definitely not a complete list
It can be used with any microscope capable of accepting RMS objectives with TL=170 mm and FL=33 mm. After installing a 12 mm adapter, this objective will of course have FL=45 mm.
Many microscopes from the 1950s and 1960s support both TL=170 mm and TL=160 mm objectives. Interestingly, in many microscopes designed for a 160 mm tube length it is possible to use objectives designed for a 170 mm tube length if the microscope eyepieces are pulled out by 10 mm in the head tube (a solution used in Leitz Wetzlar microscopes).
What is this part needed for?
- If you have an older PZO microscope without objectives and would like to complete it using original parts
- If you have a compatible microscope that lacks an objective of this magnification and would like to complete the set
- If you already have such an objective but it is damaged or of very poor quality
- If you are cautious and would like to keep such an objective as a spare
