This is description of this part:
Perfect exterior and optics. It's not easy to find a lens in this condition on the used market.
Manufacturer: Hertel & Reuss Kassel (West Germany)
Model: 40:1 N.A. 0.65 Met
Magnification: 40x
Color correction: achromat
Numerical aperture: 0.65
Tube length: 170 mm
Focal length: 37 mm
Thread: RMS
Coverglass: no
Immersion: no
Info: metallographic objective
Possible applications:
- working with reflected light (EPI)
- working with transmitted light without a coverglass
Application areas:
- metallography (surface structure)
- mineralogy (minerals, micrometeorites)
- quick viewing of smears (e.g., blood)
- extreme macro photography
What is this part needed for?
- If you don't have such a lens
- If your lens is damaged or in very poor condition
- If you need a lens with such a powerful magnification (40x) to work without a cover glass
- If you want to take extreme macro photos
