Usage examples (40)

• On a camera, the f-number is usually adjusted in discrete steps, known as f-stops.
• Each "stop" is marked with its corresponding f-number, and represents a halving of the light intensity from the previous stop.
• If your camera has manual controls, you can add more light to your shots by opening the aperture more widely (using a smaller f-number) and slowing the shutter speed...
• The literal interpretation of the f/N notation for f-number N is as an arithmetic expression for the effective aperture diameter (input pupil diameter), the focal length...