PDAF
Phase Detection AF [Passive] FocusDedicated pixel pairs on the sensor receive light from slightly different angles; the phase difference between them reveals the direction and magnitude of defocus.
Dedicated pixel pairs on the sensor receive light from slightly different angles; the phase difference between them reveals the direction and magnitude of defocus. Fast, predictive, and does not need to hunt. Used in Fuji X-series within PDAF coverage zones. Performance degrades above f/8.