[20x Magnification] With a magnification of 20x and precise specifications, this lens offers accurate and detailed observations .
[High Light Transmittance Coating] This lens provides a brighter image with a high refractive index for clear observation.
[Brass Material] Made from brass, this lens is sturdy and exquisite in design, suitable for professional use.
[Spring Device] The built-in spring prevents crushing of specimens by automatically rebounding when touching the cover glass.
[International Standard Rms Size] The screw interface is compatible with most biological microscopes, ensuring easy usage and compatibility.

Spec:

Item Type: Achromatic Objective
Model: 20/0.40
Material: Brass
Use: Microscope Accessories
Interface Size: Approx. 20.2mm / 0.80in (International Standard RMS Size)
Magnification: 20X
Numerical Aperture: Approx. 0.40mm / 0.02in
Cover Glass Applicable Thickness: Approx. 0.17mm / 0.006in
Microscope Applicable Mechanical Tube Length: Approx. 160mm / 6.30in
Working Distance: Approx. 0.55mm / 0.02in
Common Rail Distance: Approx. 195mm / 7.68in
Parfocal Distance: Approx. 45mm / 1.77in
Spring: Yes (Automatic Rebound)

Package List:
1 x Achromatic Microscope Objective
1 x Storage Box

How To Use:
Can be used after connecting with the microscope.
In order to facilitate observation, recommended to start observation at low magnification, more difficult to adjust at high magnification than at low magnification. According to the characteristics of the observed specimen, not all are suitable for observation under high magnification.