Noun
aperture priority (uncountable)
(photography, often used attributively) A setting in many professional-grade and advanced-amateur-grade cameras which allows a photographer to manually set the aperture setting of an exposure while the camera then automatically selects the correct shutter speed for that exposure.
aperture-priority (uncountable)
Alternative form of aperture priority
aperture-priority
Aperture priority is a semi-automatic shooting mode used in cameras. Source: Internet
Nikon at first produced an aperture-priority camera, but later made subtle changes on the inside of their bayonet mount, which allowed for shutter-priority automation without obsoleting the photographers lenses. Source: Internet
Olympus, however, continued with 'aperture-priority' automation in their OM system line. Source: Internet