Practical exercise
Autofocus vs. manual focus: try it yourself

1. AF Lock
Half-press shutter to lock focus on eye; recompose; take shot.
2. MF Precision
Switch to manual; focus on text in book; see if sharper than AF.
3. Low-Light AF Fail
In dark, try AF; then switch to MF with focus assist light.
4. Video Focus
Record video; switch from AF to MF mid-shot; note control difference.
5. Focus Peaking
If available, use focus peaking in MF mode to highlight sharp areas.
