This is description of this part:
Manufacturer: Carl Zeiss Jena
Model: Ph 20 0,40
Magnification: 20x
Correction: Achromat
Numerical Aperture: 0,40
Tube Length: 160 mm
Focal Length: 33 mm
Cover Glass: 0.17 mm
Immersion: no
Thread: RMS
Info: Ph = phase contrast. NOTE - this is not a "Phv" type contrast.
It can be used with any microscope from any manufacturer, along with a compatible phase contrast condenser. The microscope must be compatible, meaning it supports RMS objectives, TL = 160 mm, FL = 33 mm.
After installing the 12 mm adapter, this objective lens will have FL = 45 mm.
What is this part needed for?
- If you have a microscope without objectives and need to restock it using original parts
- If you have a microscope that doesn't have an objective lens with this magnification and want to restock it
- If you have such an objective lens, but it's of very poor quality or damaged
- If you're cautious and want to have a spare objective lens
