Changing the 60x objective of my microscope

This video shows you how to exchange microscope objectives.I ordered a used 60x microscope objective and I unpack it and install it in this video. I also do an image test. I have measured the image size and therefore could include a scale bar on the bottom left with the micrographs.

* Unpacking the objective
* Unscrewing the old objective
* Mounting the new obective
* Comparing image quality