Link to the Amazon Affiliate Shop:
The adapter was bought from AliExpress (cheaper but long waiting time):
Smartphone adapter: https://youtu.be/ZQUxmHl4xf0
Different adapters (overview) – my other channel: https://youtu.be/TXAE-CLXGUE
This adapter allows you to connect a DSLR camera to a microscope. It is relatively cheap. The adapter gave mixed results. I was not satisfied with the image quality on my stereo microscope, but the images produced with my compound microscope were fine.