This is description of this part:
Unfortunately, I don't know the name of the microscope model this microscope objective fits. This objective has the Swift logo and a typeface used by Swift (Japan) before the Chinese company Motic took over the manufacturer. I assume this objective is from around the 1970s.
Item: Microscope Objective
Type: Metallurgical Objective
Manufacturer: Swift Japan
Model: M40x 0.65 210/-
Magnification: 40x
Correction: Achromat
Numerical Aperture: 0.65
Tube Length: 210 mm
Focal Length: 45 mm
Cover Glass: No
Immersion: No
Thread: RMS
210 mm is the typical tube length for EPI metallographic objectives. This is most often calculated as a microscope with a 160 mm tube and a 50 mm EPI illuminator. The "M" designation stands for "Metallurgical" and allows for operation without a coverslip.
This may be an objective lens that was part of a reflected light setup and was not mounted on a dedicated metallographic microscope, but on a standard biological microscope (e.g., Swift M1000) with an additional EPI illuminator.
What is this part needed for?
- if you need a lens for working without a cover glass
- if you need a lens for extreme macro photography
_M40x-0,65-210-RMS-metallurgical-microscope_IMG_20260125_144614_251.jpg)