Review on Ultra HD 4K Optical Zoom USB Camera with Sony IMX317 Sensor, 2.8-12mm Varifocal Lens, Focus Adjustable, 3840x2160@30fps, Plug and Play for Conference Live Streaming and Web Cameras by Kevin Stephan

I bought 2 of these cameras to upgrade to 4K for my Facebook videos. The cameras are mounted upside down on the bottom of a bookshelf above my desk. The OBS software allows me to rotate images 180 degrees so the image is on the right side. These cameras are very well matched to each other. In my setup program I can apply the same settings to both cameras and they match. My previous cheap webcams didn't even come close to that. The only downside I have is the somewhat finicky manual focus. It's difficult to focus properly at arm's length. By closing the aperture, I can increase the depth of field to get acceptable focus. Autofocus would be a nice upgrade. I can wholeheartedly recommend these cameras.