F-Stop is

• A. A setting that measures light temperature.
• B. A setting that controls shutter speed.
• C. A setting that controls the amount of light that passes through the lens by adjusting the aperture size.
• D. A setting that adjusts color saturation.

Answer: (C)

F-stop tells you how open the lens aperture is, which controls how much light passes through the lens. It’s the aperture size expressed as a ratio of the focal length to the opening. A smaller f-number means a larger opening, more light reaches the sensor, and the depth of field is shallower. A larger f-number means a smaller opening, less light, and a deeper depth of field. This is why it directly affects exposure and sharpness in the scene.

Color temperature, shutter speed, and saturation are different camera settings: color temperature relates to lighting color, shutter speed controls how long the sensor is exposed, and saturation affects color intensity.