How to choose a webcam
Sensor size and aperture decide how a camera looks in a real room. Resolution decides almost nothing above 1080p, because video calls are compressed long before the pixels reach the other end.
Resolution and frame rate are separate specs
A camera badged 4K may only reach 4K at 30fps, and fall to 1080p for 60fps. Motion looks smooth at 60fps and slightly stuttery at 30. Check which combinations the camera actually supports, not the highest number on the box.
Low light is where cameras separate
A larger sensor and a wider aperture gather more light, so the image stays clean instead of turning noisy and smeared. A small sensor compensates by raising gain, which is why a cheap 4K camera can look worse than a good 1080p one in an ordinary room.
Field of view
Around 65 to 78 degrees frames one person at a desk. Above 90 degrees pulls in the whole room and distorts faces at the edges. Fixed wide angle is a problem you cannot crop your way out of on every platform.
Focus and exposure
Autofocus hunting mid call is distracting. Fixed focus is stable and unforgiving if you lean in. Manual exposure control matters if you sit in front of a window.
Connection
If the camera runs through a hub or dock, check the available bandwidth. A 4K stream over a shared USB 2.0 link will drop frames regardless of the camera.
Audio
Built in microphones are convenient and universally mediocre. If audio matters, budget for a separate microphone and ignore the camera's.
Common mistakes
- Buying 4K for calls that cap at 720p or 1080p anyway.
- Blaming the camera for what is actually a lighting problem.
- Mounting on a thin monitor bezel the clip was not designed for.