Plastic part, polarisation method
LM microscope adapters offer the option to add a filter to the adapter. This permits the use of optical filters (such as polarisation filters, grey filters, UV filters, IR filters, etc.) independently of the type of microscope being used, which means that even very basic and affordably priced microscopes can be employed for special imaging applications.
The filter (a polarisation filter, for example) is inserted at the level of the bayonet mount. This does not change the height of the adapter.
Nikon’s Z50 DX-format mirrorless camera performs impressively on the microscope. More about the camera here