My camera on my mac suddenly zoomed in

Hi!

Yesterday I got my new macbook pro air 2020 & everythings works fine. But suddenly at mid-day in my zoom call the camera ‘zoomed’ in. Now my screen is grainy & it literally zoomed in to my face. I tried to restart it sae effect. Uninstall zoom (same effect). So now when I’m in a zoom my face is huge - even when I’m 2 meters away sort of speak.

please can someone explain this behaviour.

I’ve spent all my money on this one