CHOOSE THE RIGHT AF MODE
1 HOUR
ll DSLRs have a conventional phase-detection autofocus module. The main reflex mirror is partially translucent, so light can pass through it and be directed by a second mirror, downwards to the autofocus module. This module contains a number of autofocus points, each with its own set of sensors. The sensors compare the light entering from opposite sides of the lens; if the light is in
