lens aperture
Camera's adjustable pupil
Lens aperture is the opening in a camera lens that controls how much light reaches the film or sensor.
A wider aperture lets in more light and creates a shallow depth of field, blurring the background; a narrower aperture admits less light but keeps more of the scene in focus.
Aperture is measured in f-stops: shooting at f/2.8 gives you that creamy bokeh.
- depth of fieldZone of acceptable sharpness
- shallow focusNarrow depth of field
- irisEye's pigmented disc
- pinholeMinute circular opening
- diaphragmMuscle separating chest, abdomen
bokeh · hyperfocal distance · diffraction · focal length · focal plane · overexposure · aberration · vignetting · optical zoom · wide-open · sharpness · pupil · opening · zoom · blur · circle · shallow · focus