the.com/autofocus
the camera deciding it knows what you meant to look at, before you did.
means a system that automatically adjusts a lens to make the subject sharp, using sensors instead of your eyeballs.
from emerged in 1970s SLR prototypes, went mainstream with the Pentax ME-F in 1981 and the Minolta Maxxum in 1985, ending the manual-focus ring's monopoly on blur-related arguments.
phase detectionsplits light in two, measures the mismatch
contrast detectionhunts for the sharpest edge, slower but precise
eye autofocusmodern cameras now lock onto eyeballs specifically