This generic $19 HDMI capture card allows you to connect almost any dSLR or mirrorless camera (that can output clean HDMI) as a webcam for your computer.
You will find the product under different brand names. They all seem to be the same internally. The one I am currently using is branded as “BlueAVS”. This is the link to Amazon.
The following video shows how to use the card and use it as a webcam for recording or online meetings.