🔬 How to upgrade a microscope to polarized light

How do you add polarization filters to a microscope? I experimented with several ways and want to show you the different possibilities.Among other things, I tried to 3D print a filter holder, and this worked well.

The microscope in the video is a Swift/National Optical SS110 microscope, a low-cost introductory microscope, but the principles illustrated also work for other microscopes.
Affiliate link to the microscope is here.

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