Glossary
- ambient light
The natural or artificial light within a scene. Also called available light.
- aperture
The lens opening through which light passes. Aperture size is adjusted by opening or closing the diaphragm. Aperture is expressed in f/numbers, such as f/8 and f/5.6.
- artifact
An unintentional or unwanted element in an image caused by an imaging device or appearing as a byproduct of software processing, such as compression, flaws from compression, color flecks, and digital noise.
- artificial light
The light from an electric light or flash unit. The opposite of natural light.
- Auto ISO
Considering the lighting, lens used, and exposure settings, the camera automatically selects an appropriate ISO for handheld shooting, from ISO 100-6400.
- autofocus
The camera automatically focuses on a subject by using the selected autofocus point shown in the viewfinder or tracks a subject in motion and then creates a picture with the subject in sharp focus. Press the Shutter button halfway down to activate this.
- automatic exposure
The camera meters the light in the scene and automatically sets the shutter speed (ISO) and aperture necessary to make a properly exposed picture.
- automatic flash
When the camera determines that the existing light is too low to get either a good exposure or a sharp image, it automatically fires the built-in flash unit.
- axial chromatic aberration
A lens phenomena that bends different color light rays at different angles, thereby focusing them on different planes. Axial chromatic aberration ...
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