What is Autofocus and subject detection?
Phase-detection AF that recognises eyes, people, animals and vehicles.
Short answer
Contrast-only AF 'hunts' and pulses in video — avoid it in 2026.
Autofocus and subject detection when buying a camera (mirrorless & compact)
Phase-detection AF that recognises eyes, people, animals and vehicles.
Why it matters: Tracking AF decides how many shots of kids, pets and sport come out sharp.
Look for: Contrast-only AF 'hunts' and pulses in video — avoid it in 2026.
Full Camera (Mirrorless & Compact) buying guide