[ GLOSSARY DEFINITION ]
Camera
Phase Autofocus
A fast autofocus system that measures light phase to lock focus instantly.
Also known as:
PDAF
Phase detection autofocus
Dual Pixel
Full Definition & Technical Explanation
Phase autofocus (PDAF) compares split light beams to focus quickly, unlike slower contrast AF. Phones often use Dual Pixel PDAF, where every pixel helps focus — see Autofocus: Phase autofocus (Dual Pixel).
It enables reliable tracking of moving subjects for video and sports shots.
Where Phase Autofocus Matters
Smartphones
Frequently Asked Questions
What is Phase Autofocus?
A fast autofocus system that measures light phase to lock focus instantly.
What terms are related to Phase Autofocus?
Related Camera terms include OIS, Sensor Size, Front Camera.
Related Technical Terms
OIS
Hardware that moves the lens to counter hand shake, giving sharper photos and steadier video.
Camera
Sensor Size
The physical size of the camera sensor (1/1.56", 1/2.55"); larger sensors capture more light.
Camera
Front Camera
The camera on the screen side, used for selfies and video calls.
Camera