Aberration – Image distortion caused by lens flaws.

Accessories – Extra gear (straps, filters, batteries, etc.).

ACR (Adobe Camera Raw) – Adobe’s RAW file editor.

Action Photography – Taking photos of fast-moving subjects.

AE (Auto Exposure) – Camera chooses exposure automatically.

AF (Autofocus) – Camera focuses on its own.

AF-C / Continuous AF – Autofocus that tracks moving subjects.

AF-S / Single AF – Autofocus that locks on still subjects.

Ambient Light – Natural or already existing light.

Angle of View – How much of the scene the lens captures.

Anti-Aliasing Filter – Reduces jagged edges in digital images.

Aperture – Opening in the lens that controls light.

Aperture Priority (A/Av) – You choose the aperture; camera chooses the rest.

APS-C – A common smaller camera sensor size.

Artefacts – Unwanted digital errors or distortions.

Aspect Ratio – Shape of the image (like 4:3, 16:9).

Astrophotography – Photography of the night sky.

Autobracketing – Taking several exposures automatically.

Auto ISO – Camera chooses ISO automatically.