The "f=3.85mm" refers to the of the lens. In the world of digital sensors (which are much smaller than traditional 35mm film), a 3.85mm focal length typically indicates a wide-angle lens .
Are you having trouble getting a specific to your computer, or digital zoom f 3.85 mm megapixel 10x driver
If you are searching for a for a device with these exact markings, you are likely trying to get an older "no-name" or "generic" webcam/camera to work with a modern PC. The "f=3
Because many of these devices use generic chipsets, Windows or macOS will often recognize them as a . digital zoom f 3.85 mm megapixel 10x driver