# Aperture
> Aperture is the camera lens opening that affects how much light reaches the sensor.
Topics: Smartphones
Difficulty: Getting technical
Aliases: f-number, f-stop
Updated: 2026-06-26T08:00:00.000Z
## Go deeper
Aperture is the camera lens opening that affects how much light reaches the sensor. In everyday buying decisions, the useful question is not just what the spec says, but what it changes for comfort, cost, speed, safety, or battery life.