aperture
/ˈæpərtʃər/
noun
- An opening, hole, or gap through which something passes or is seen.
- Birds flew through the aperture in the cave ceiling.
- The telescope has a large aperture to collect more starlight.
- The camera's aperture lets in light to create a clear photo.
- In photography, the adjustable opening in a lens that controls the amount of light reaching the film or sensor.
- A smaller aperture gives a sharper image but requires more light.
- She set the aperture to f/2.8 for a bright, blurry background.
- Learning to adjust the aperture is one of the first steps in photography.