Linked from
The 23 pages that link to Aperture, each with the reason it gives.
CinematographyRelated: Its size affects exposure and the depth of field in a shot.
Deep focusRelated: A narrower aperture increases depth of field, though it admits less light.
Depth of fieldRelated: A narrower opening generally increases the range that appears sharp.
Digital photographyRelated: Its size affects both exposure and depth of field.
AstrophotographyRelated: Aperture controls light collection and influences exposure time.
Camera obscuraRelated: Its size controls the trade-off between image brightness and sharpness.
Digital cameraRelated: Its size affects sensor exposure and the depth of field.
Camera lensRelated: The lens aperture regulates exposure and affects depth of field.
Spherical aberrationRelated: Restricting the aperture can block highly aberrated marginal rays.
Camera (still photography)Related: Its size regulates light and changes depth of field.