If you’re thinking of buying a webcam, here’s an option you may not have thought of. If you happen to have a DSLR, mirrorless or compact camera, you may be able to put it into service as a high-quality webcam. In some cases, particularly with select Canon, Nikon and Sony models on Windows, you might not even need any extra hardware at all.

Source: How to use your DSLR camera as a webcam | Engadget